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A complete collection of utility toolsMake small things easier.
From mortgage calculation to image processing, from life query to network detection.
Find the tools you have in hand and leave time for more important things.
Your daily tool library329Tools
11 clear classificationFree use
Loans and Finance23
Mortgage, car loan, installment, savings and daily consumption calculation.
mortgage calculator
Calculate the monthly payment of commercial, provident fund and portfolio loans, compare the equal principal and interest and equal principal, and download the complete repayment plan.Mortgage Early Repayment Calculator
Comparing the monthly payment or shortening the time limit after repaying the loan in advance, and calculate the impact of savings on interest and expenses.car loan calculator
Calculate monthly payment, interest and total expenditure of car according to car price, down payment and annual interest rate.Actual annualized cost
Convert the monthly repayment and pre-handling fee to the actual annualized cost.Buying a Budget Calculator
Housing price budgets are calculated on the down payment, income, liabilities and acceptable monthly payments.Deposit Interest and Compound Interest
Calculate the balance and income of the principal and monthly additional deposits at the specified interest rate.savings target calculator
The monthly deposit amount is inverted according to the target amount, existing deposit, maturity and interest rate.AA account calculator
Record multi-person advance payment and project participants, and generate a settlement transfer list.Comparison of product unit price and discount
Compare the unit prices after discounts, full discounts and coupons for different specifications of products.RMB capitalization conversion
Convert the digital amount to a financial capitalization in batches, accurate to the point.Profit and gross profit margin calculation
Calculate the corresponding selling price of commodity gross profit, gross profit margin, cost increase rate and target gross profit margin.break-even calculator
The principal-guaranteed sales volume is calculated according to the fixed cost, selling price and unit variable cost.Monthly Budget
Aggregate income and sub-subjects, calculate balances, savings ratios and over-budget items.Self-fill exchange rate conversion
The exchange rate and handling fee are estimated according to the exchange rate and handling fee filled in, and support reverse conversion is supported.Computational growth rate calculation
Calculate the compound annual growth rate according to the beginning, the end of the period values and the number of years, and apply to indicators such as revenue and sales.Line Depreciation Calculator
Generate the annual straight-line depreciation table according to the original value of the asset, the estimated residual value and the use year.Subscription fee summary
Summarize monthly, quarterly and annual payment subscriptions, converting average monthly and annual expenses.Comparison of equipment rental and purchase cost
Compare equipment usage costs based on the number of months of use, purchase price, maintenance fee and rent.E-commerce Pricing Calculator
Included in commodity costs, freight, platform deduction points and target profit rate, the selling price is reversed.Tiered Pricing Calculator
The purchase quotation details are calculated according to the entire ladder price or segmented progressive price.Payment Reconciliation Tool
Compare the two CSV balance sheets according to the order number, and list the difference between the missing items and the amount.Accounts Receivable Aging
According to the designated statistical date, the unexpired and different overdue ranges are summarized, and the amount of receivables is summarized.Inventory Reorder Calculator
Combined with daily average sales volume, delivery cycle, safety stock and in-transit quantity, the replenishment reference is calculated.Wages and Taxes14
Salary tax, annual sanction, special deduction and tax calculation.
Pre-tax salary calculator
According to the cumulative withholding method, the monthly tax and manual wages for the whole year are calculated.Year-end bonus tax comparison
Compare eligible annual one-time bonuses to be taxed separately and incorporated into comprehensive income.Annual personal tax rebate estimate
Summarize wages, labor services, remuneration and concessional income, and calculate the annual tax refund reference.Special additional deduction trial calculation
Summarize child-child education, infant care, housing, support the elderly, continuing education and medical deduction for serious illness.Calculation of withholding tax on labor remuneration
Calculate the tax withholding tax and amount received for a single resident individual labor service remuneration.Social Security Payment Calculator
Calculate individual and unit payment according to the applicable base, upper and lower limits and the ratio of each insurance type of self-fill in the city.Provident fund deposit calculator
Calculate the monthly payment amount and the total amount of the annual deposit of individuals and units, and support the base limit and rounding method.Conversion of VAT including tax
Convert between tax-included, tax-excluding tax and value-added tax.Estimate of deed tax for buying a house
Estimate deed tax is estimated based on the housing area and the number of family houses.Estimated vehicle purchase tax
According to the taxable price and the year of purchase, the purchase tax of fuel vehicles or new energy vehicles that meets the conditions of the catalog is calculated.Salary and hourly conversion
Convert the daily salary and hourly salary according to the monthly salary, the number of working days per month and the daily working hour.Conversion of entitled wages
Convert the salary according to the self-fill calculation base, the accrued salary days and the actual salary days.Sales commission calculator
Support a unified proportion or progressive commission, and calculate the pre-tax amount of the basic salary plus the commission.Accounting for salary slips
The items that should be issued and deducted in the salary slip are entered, and the actual amount and deduction ratio are checked.Date & Life37
Calendar, date, number segment, region and cost of living query.
Perpetual calendar and lunar calendar conversion
Two-way conversion of the Gregorian lunar calendar, check the arrangements for stems and branches, solar terms, festivals and 2026 holidays.calculator
Calculate the number of days difference between two dates, or query the specified number of days before and after a date.Age and birthday calculation
Calculate the age, month age, birth day and next birthday.world time zone conversion
Change meeting time by source timezone and compare local times for multiple areas.Countdown and Stopwatch
Create multiple countdowns, Pomodoros, or stopwatches that support pauses, continues, and resets.Mobile phone number attribution query
Check the province and city, original operator, area code and zip code of the mobile phone number segment.Area code zip code query
Reverse region information by region name, telephone area code or zip code.License plate abbreviation query
Check the abbreviations of provincial-level license plates in mainland China and the prefixes of cities that have been included.Home Electricity Calculator
Estimate household electricity and electricity charges based on electrical power, usage time and electricity price.Fuel consumption and travel cost
Calculate the fuel consumption of 100 kilometers, the cost of a single kilometer and the fuel cost of the planned itinerary.Date week and week
The date of the week is the day of the week, the day of the year and the number of ISO weeks.Calculation of working days and self-determined rest days
Work days within the statistical date range, self-fill rest days and make-up dates are supported.Duration and conversion
Batch adds hours, minutes and seconds to total hours and total minutes.Recipe usage conversion
Convert the weight of the ingredients in batches according to the original number and the target number.Running speed calculation
It is used to calculate the speed, average speed and the distance target distance from the distance and completion time.Parking fee rules
The parking fee is estimated according to the free time of self-fill, billing unit, unit price and capping every 24 hours.Express volume and weight calculation
Compare the actual weight of the package and the volume weight, and estimate the billing weight.Tile usage and budget
Estimate the number of pieces, number of boxes and brick purchase budget according to the paving area, tile size and loss rate.Date addition and subtraction calculation
Count days, months and years forward or backward from the specified date.Schedule Time Conflict Check
Check the time overlap for multiple schedules on the same day, and count the total usage time.Estimated wall paint usage
Estimate paint purchases based on wall area, door and window area, paint number and coverage rate.Estimate of electricity consumption and cost of home appliances
Estimate power consumption and electricity charges based on equipment power, daily usage time and number of days.EV Charging Cost Calculator
Estimate power consumption, cost and duration of battery capacity, power change and charging efficiency.Expiration Date Calculator
Calculate the maturity boundary according to the production date and the number of shelf days, and you can choose whether the production date is counted as the first day.12/24-Hour Time Converter
Switch between the 24-hour system and the 12-hour system with AM and PM, and the number of seconds is retained.English Date Format Converter
Convert Gregorian dates to British, American and ISO dates and display English days.Brick Quantity Calculator
The number of bricks for single-layer walls is estimated according to the net area of the wall, the size of the brick surface, the gray joints and the loss.Concrete Volume Calculator
Estimate volume and loss purchase amount based on rectangular plate, cylinder or cuboid size.Tiered Water Bill Calculator
Calculate the water fee details according to the self-fill stairs usage, unit price and surcharge.Tiered Gas Bill Calculator
Calculate the tracing bill according to the self-fill gas ladder price and fixed cost.Wallpaper Quantity Calculator
Estimate the number of the entire roll according to the length, height, coil size and flower distance of the wall.Curtain Fabric and Cost Calculator
Estimate fabrics and costs based on track width, finished product height, fold multiples and cloth width.Travel Budget Calculator
Fill in the team fixed fee, each person fee and daily cost respectively, and summarize the travel budget.Chinese Almanac
Check the lunar calendar, solar term, traditional taboos, rush evil and orientation of today or on a specified date.China Public Holiday Countdown
Check how many days there are in each holiday throughout the year, show the number of holidays, work on vacation and status.Calendar Event ICS Generator
Generate a single event file that can import the calendar application, support time zone and early reminder.Round-Robin Schedule Generator
Generate a single-cycle or host and guest swap double-cycle schedule for the entry list, and automatically arrange odd-numbered rounds.office and writing53
Text processing, QR code, bar code and table conversion.
word count
Statistics of Chinese characters, English words, characters, paragraphs, punctuation and expected reading time.Comparison of text differences
Compare two paragraphs of text and highlight new, delete, and retain content.Text de-repeat and sort
De-weight, go blank, sort by line, and display the number before and after.Batch find replacements
Process the text according to multiple sets of rules, preview and copy the replacement result.English letter case conversion
Convert uppercase, lowercase, first letter and first to uppercase of words.Chinese characters to pinyin
Convert Chinese characters to tones, no tones or the first alphabet pinyin, and support polyphonic options.QR code generator
Generate QR codes and download them for text, URLs, or Wi-Fi configurations.QR code identifier
Upload or paste QR code pictures, and extract content locally.barcode generator
Generate Code 128, EAN-13 and Code 39 barcodes, which can be downloaded and printed.EXCEL and CSV conversion
Convert between XLSX, CSV and TSV, preview the worksheet and select the separator.Text line numbers and prefixes
Add continuous numbering, custom prefix and suffix to multiline text.Differences between the two lists
Compare the common items, unique items and de-consolidation results of the two lists.Full-width half-width character conversion
Convert all-width English alphabets, numbers, punctuation and spaces to facilitate the sorting of table text.long text segmentation tool
Split long text by the specified number of characters to generate a numbered segmented list.CSV table row column transposition
Swap the rows and columns of CSV, and support Chinese, quotation marks, line breaks and empty cells.Markdown table generation
Convert CSV tables to Markdown tables, which support left, middle and right alignment.Text privacy desensitization
Cover the mobile phone number, 18-digit ID card format and some characters in the mailbox locally.Paper size and print pixels
Inquire about common A series, B series and Letter paper sizes, and calculate pixels according to DPI.Text number and link extraction
Extract common mobile phone numbers, emails or HTTP links from text locally, and support deduplication.Blank clearing of text
Clear blanks at the beginning and end of the line, continuous spaces and blank lines, and uniform newlines.Markdown title directory generation
Generate hierarchical directory text from Markdown's pound header.CSV column selection and rearrangement
Extract, delete, or rearrange CSV fields by column number, leaving text and leading zeros.CSV two table associations
Press the specified key column to make a left connection or internal connection to the two CSVs, and organize the corresponding data.Text Reverser
In reverse order of the whole segment character, each line character or line order, the expression combination is reserved.Word and Character Frequency Statistics
Count the occurrences of characters or spaces to separate words, and the output frequency ranking.Merge Text Columns Line by Line
Pair two lines of text by line number, and use self-fill to separate and comply with each other.CSV condition filtering
Filter CSV rows by column number and text condition, leaving the header and leading zeros.CSV group summary
Grouping by specified columns, the count, total, average, min and maximum value of the numeric columns are calculated.Excel worksheet merge
Import multiple xlsx worksheets into a new workbook with the same name as the automatic numbering.Split Excel by Worksheet
Split a copy of each worksheet of XLSX into a separate XLSX and package and download.Excel to HTML Table Converter
Convert the worksheet in XLSX to a stand-alone, downloadable static HTML table.Word document text extraction
Extract paragraphs, table text and newlines from the docx body locally, and download txt.Batch File Renamer
Preview file name replacement, prefix and numbering rules, and download the zip copy after confirmation.Excel Table Comparison
Press the unique key to compare two XLSX tables, list new, delete and field modifications.Split Excel by Column Value
Split the worksheet by department, city, etc., and package and download multiple xlsx files.Spreadsheet Duplicate Checker
Press the specified key column to find the XLSX duplicate rows, preview the duplicates and export the cleaning table.Markdown to HTML Converter
Preview Markdown typography in real time, copy or download securely filtered HTML.SRT and VTT Subtitle Converter
Convert subtitle format, adjust the overall timeline, or extract subtitle text.URL Slug Generator
Batch the title of the article into a concise URL path fragment.Invisible Character Detector
Locate control characters, zero-width characters and two-way text control characters in the text.Unicode Normalization
Compare and convert the NFC, NFD, NFKC and NFKD Unicode normalization forms.Morse Code Converter
Convert English alphabets, numbers and commonly used punctuation to Morse code and restore.Caesar Cipher and ROT Converter
Move the English alphabets according to the specified offset, and support decoding and ROT13.Levenshtein Edit Distance
Calculate the Levenshtein editing distance and normalized similarity between the two paragraphs.N-gram Frequency Analyzer
Count the combination frequency of continuous characters or blank segmentation sequences.Email List Syntax Checker
Batch check commonly used mailbox formats, locate duplicates, and export a list of valid formats.ISBN Validator and Converter
Check ISBN-10 and ISBN-13 in batches and convert compatible book numbers.GTIN Barcode Validator
Check GTIN-8, 12, 13, 14-digit product numbers, or calculate the last digit check code.Cartesian Product of Lists
Combine the two lists into specs, options, or test data combination tables.CSV Pivot Table
Generate cross summary tables by row dimension and column dimension, which supports summation or counting.CSV Append by Header
Merge two CSVs in different column order, and align the fields according to the original text of the header.CSV Column Profiler
Count the number of nulls, unique values, duplicates and strict number formats in each column.Contact vCard Generator
Fill in the contact information to generate a vCard 3.0 file that can import the address book.Pictures, PDFs and files40
Process pictures, PDFs and files on the machine, preview and download the results.
Batch compression of images
Adjust the quality with the maximum size to compress the picture in batches, compare the volume and download it.Image format conversion
Batch conversion between JPG, PNG, and WebP.Image crop and zoom
Specify the size of the pixels, select the Analytic Scale or Center Crop.Add watermark to images
Add a text or image watermark to the picture, adjust the position, transparency and size.Image coding tool
Frame the area on the preview image and add a solid shade or mosaic.ID photo size and layout
Crop the existing photos into one inch, two inches and other specifications and generate a printed layout.Long picture stitching and puzzles
Splicing multiple pictures in vertical, horizontal, or mesh.Image to PDF
Convert the picture to A4 or the original size PDF of the picture in the specified order.PDF merge and split
Combine multiple PDFs to extract, sort or delete pages by page number range.pdf to pictures
Render the selected PDF page into a PNG or JPG picture.Picture rotation and flip
Rotate the picture 90, 180 or 270 degrees locally, support horizontal and vertical mirroring, download PNG.Picture size and volume viewing
Read the image width and height, number of pixels, aspect ratio and file volume, and download the inspection report.pdf page rotation
Rotate the PDF page according to the page number range, keep the unselected page, and download the new document.View the number and size of PDF pages
View the number of PDF pages, each page size and rotation angle, and download the text report.Picture black and white and reverse color
Convert the picture to a grayscale, black and white binary map or inverse color map, preview and download the PNG locally.pdf add page number
To add a number page number to the PDF page, you can select the starting number and footer position.PDF text extraction
Extract the optional text in the text PDF, organize and download txt by page.Pictures of nine palace grids and blocks
Cut the picture into multiple PNGs in rows, package and download, and support Jiugongge.Image rounded corners and transparent corners
Add custom pixel rounded corners to the picture, and export the png with transparent corners.Multi-file zip packaging
Select multiple files locally and type zip to reduce the trouble of transferring one by one.Text file encoding conversion
Conversion between UTF-8, GB18030 and UTF-16 encoding, supports candidate recognition and manual correction.Image and Base64 Converter
Convert static images to data urls, or restore image data url to png download.Add borders to images
Adds a border of the specified width and color to the static picture, and outputs the PNG.Image transparency adjustment
Adjust the transparency of the entire image, keep the original transparent channel and export the PNG.PDF Watermark Tool
Add a text or image watermark to the specified PDF page, and set the location and transparency.PDF Page Cropper
Preview the PDF page, and press the upper right and left margins to adjust the display range.PDF Page Size Converter
Scale the PDF page to A4, A3 or Letter paper and center it in equal proportions.ZIP Extractor and File List
View the zip directory and file volume in the browser, and select file download.Duplicate File Finder
Calculate SHA-256 according to the contents of the file, and the groups show exactly the same files.Image Color Palette Extractor
Extract common colors from local images, preview the palette and copy HEX and RGB.Image Pixel Difference
Compare two pictures of the same size to generate differential heatmap and change pixel statistics.Image Color Histogram
Statistical image RGB and brightness distribution, derived histogram and complete 256-level statistical table.Image Thresholding
Convert the picture to pure black and white according to the brightness threshold, which can invert the foreground and background.Replace Image Colors
Replace the specified RGB color in the picture by color tolerance and preserve the transparency.Trim Image Borders
Remove the continuous solid or transparent blanks around the picture, and keep the content enclosed box.Image to ASCII Art
Convert the picture brightness to a isometric ASCII character drawing and download the text.Image Pixel Color Inspector
Reads the RGBA value, HEX color and transparency of the specified pixel coordinates.File Signature Inspector
Check the token bytes at the beginning of the file, identify several common formats and display hex previews.Binary File Splitter & Joiner
Split files by fixed block size, or merge binary chunks without loss in a definite order.Binary File Comparison
Compare two documents by byte, statistical differences and export the first 1000 different locations.Audio & Video12
Local audio clips, mixing, waveform analysis and video extraction.
Audio Cropping with WAV Export
Crop the audio locally in the browser and export the 16-bit PCM WAV.Audio Gain & Peak Normalization
Adjust the short audio gain, or adjust the highest sampling peak to the specified DBFS.Audio Fade In & Fade Out
Adds a linear or cosine fade in a specified duration to the short audio.Audio Channel Mixer & Splitter
Mix mono or stereo audio into mono, swap left and right channels.Reverse Audio
Invert the short audio in the sampling order, and export the playable backward file.Join Audio Clips
The multi-segment short audio is connected end-to-end in the selected order, and a fixed interval can be inserted.Audio Waveform & Sample Analysis
View waveforms of short audio, sample peaks, root mean amplitude, DC offset and clip samples.Sine Test Tone Generator
Generate a sine test tone file with the specified frequency, duration and amplitude.Trim Leading & Trailing Silence
Find the sound boundary according to the sampling threshold, cut to mute ends and keep the self-determined margin.Two-Track Audio Mixer
The two short audios are superimposed according to the gain and the second track delay, and the mixing WAV is output.Audio Sample Rate Converter
Converts the short audio supported by the browser to a PCM WAV with a specified sample rate.Video Frame Capture
Take a frame from the designated time of the local short video, and download the png of the original screen size.Learning and Calculation37
Units, mathematics, statistics, grades and learning aids.
scientific calculator
Calculate parentheses, powers, roots, trigonometric functions, and commonly used mathematical expressions.Unit conversion
Convert length, area, volume, mass, temperature and speed.Percentage and proportional calculation
Calculate the proportion, growth rate and allocate values by weight.Geometric area and volume
Calculate the area or volume of rectangles, circles, triangles, cuboids, cylinders and spheres.Data Statistics Calculator
Calculate the mean, median, extreme, population and sample variance and standard deviation.Achievement and grade point calculation
The weighted average score is calculated according to the credits, and the self-fill course performance point or linear rules are supported.Random lottery and grouping
Import the list, randomly extract, group or generate the appearance order.Chinese and English typing speed test
Measure the speed, accuracy rate and record the score using the built-in or custom material.Fractional Calculator
Complete the addition, subtraction, multiplication and division of scores, apportionment and finite decimals conversion.digital hex
Convert positive and negative integers between 2 and 36 hexes.Maximum common divisors and least common multiples
The largest common divisor and minimum common multiple of multiple integers are calculated in batches.Solving the quadratic equation
Solve ax²+bx+c=0, which supports real-numbered roots, complex roots and degraded primary equations.arithmetic arithmetic sequence calculation
Calculate the nth, first n, and various details of the arithmetic or arithmetic sequence.Triangle corner calculation
It is known that the three angles, areas, circumference and inner and outer circle radii of the triangle are found on the three sides.Arrange Combination Calculator
Accurately calculate the number of permutations and combinations selected from n different elements.Integer prime factor decomposition
Decompose positive integers into prime factors to see if it is a prime number and factor product.Binary primary equations solution
Solve the two binary one-time equations, and judge the unique solution, no solution or infinite multi-solution.weighted average calculation
The weighted average is calculated according to the value and weight of each item, and is applicable to the summary of grades and indicators.Matrix Basic Operations
Calculate matrix addition, subtraction, multiplication and transpose, and check whether the dimensions are compatible.Decimal precision rounding
Rounding decimal text according to the specified decimal places, supports rounding, truncation, up and down.Screen PPI and Size Calculation
The pixel density, screen width and dot distance are estimated from the resolution and diagonal dimensions.Roman Numeral Converter
Convert between 1 to 3999 integers and standard Roman numerals.Integer to English Words Converter
Convert positive and negative integers into English numerals and support numbers within one trillion.Arithmetic Worksheet Generator
Generate integer addition, subtraction, multiplication and division exercises and independent answers, which is easy to copy and print.Proportional Dimensions Calculator
Fix the original aspect ratio, and calculate the dimensions of the other side according to the target width or height.Linear Interpolation Calculation
The interpolation of intervals is calculated from two known points to display the slope of the line and the equation.Linear Regression Calculator
A unary linear fit is calculated for paired data, and the scatter, fitted lines and related indicators are displayed.Binomial Distribution Calculator
Calculate the probability that the independent repetition test is just, at least, or at most successfully specified.Normal Distribution Calculator
Calculate the probability of the normal distribution interval and the quantile of the specified cumulative probability, and display the curve.Polynomial Calculator
Calculate polynomial addition, multiplication, derivation and specify point function values.2D and 3D Vector Calculator
Calculate vector and difference, point product, length, angle and three-dimensional fork product.Complex Number Calculator
Add, subtract, multiply or divide two complex numbers, and calculate the result's magnitude and argument.Two's Complement Calculator
Converts the signed decimal integer, two's complement, and hexadecimal in the specified bit width.Boolean Truth Table Generator
Generate all input combinations and results for Boolean expressions, and judge whether it is constant or false.Poisson Distribution Calculator
The probability and cumulative probability of k events that appear when a given average number of events is calculated.Hypergeometric Distribution Calculator
Find the probability of a specified number of successes when sampling without replacement from a finite population.Wilson Proportion Confidence Interval
The Wilson proportional confidence interval is calculated from the number of successes and sample sizes.Engineering & Electronics27
Circuit, mechanical, fluid, thermal and engineering geometry learning calculation.
Resistor Color Code Calculator
The resistance value, tolerance and range are calculated according to the four-color ring or five-color ring.Ohm's Law Calculator
Input two independent electrical parameters to calculate voltage, current, resistance and power.Series and Parallel Resistor Calculator
Calculate the equivalent resistance of all positive resistors in series or all in parallel.Series and Parallel Capacitor Calculator
Calculate the equivalent capacitance of capacitors in series or parallel and their stored energy at a given voltage.RC and RL Transient Response Calculator
Find the time constant and normalized response of an ideal first-order RC or RL circuit.LC Resonant Frequency Calculator
Calculate an ideal LC resonant frequency or solve for the required inductance or capacitance.LED Series Resistor Calculator
Estimate a series LED resistor, its dissipation and a rounded-up E12 reference resistance for low-voltage DC.Loaded Voltage Divider Calculator
Compare unloaded and loaded divider voltages and calculate the dissipation in each resistor.Decibel and Gain Ratio Converter
Convert between decibels and linear power or amplitude ratios using the correct logarithmic factor.AC Power and Power Factor Calculator
Calculate real, reactive and apparent power for sinusoidal single-phase or balanced three-phase circuits.Power Factor Correction Calculator
Estimate capacitive reactive power compensation from real power and a target power factor.Multistage Gear Train Calculator
Calculate stage ratios, output speed, torque and rotation direction for a multistage external gear train.Two-Pulley Belt Length Calculator
Calculate the ideal length, wrap angles and speed ratio for an open or crossed two-pulley belt.RPM and Peripheral Speed Calculator
Convert between rotational speed and peripheral linear speed and calculate angular velocity.Bolt Circle Coordinate Calculator
Generate coordinates for equally spaced holes on a specified bolt circle.Spring Force and Energy Calculator
Calculate restoring force and elastic potential energy from spring stiffness and displacement.Projectile Motion and Free Fall Calculator
Calculate flight time, horizontal distance, maximum height and a trajectory table for ideal projectile motion.Ideal Gas Law Calculator
Solve for one unknown among absolute pressure, volume, amount of substance and absolute temperature.Solution Dilution Calculator
Calculate stock solution and added solvent volumes using concentrations expressed in the same units.Linear Thermal Expansion Calculator
Calculate length change from initial length, thermal expansion coefficient and temperature change.Sensible Heat and Heating Time Calculator
Calculate sensible heat and estimate heating time from input power and efficiency.Density, Mass and Volume Calculator
Solve for density, mass or volume when the other two quantities are known.Pipe Flow Rate and Velocity Calculator
Calculate volumetric flow from pipe internal diameter and mean velocity, or solve for velocity.Pipe Reynolds Number Calculator
Calculate pipe Reynolds number from density, mean velocity, internal diameter and dynamic viscosity.Hydrostatic Pressure Calculator
Calculate pressure increase, absolute pressure and force on a horizontal plane at a given liquid depth.Horizontal Cylinder Tank Volume Calculator
Calculate liquid volume and remaining space in a horizontal cylindrical tank from diameter, length and liquid height.Second Moment of Area Calculator
Calculate area, centroidal second moments of area and section moduli for rectangles, solid circles and annuli.Webmaster Tools26
Site Response, Certificate, SEO, and crawl rule checks.
HTTP response header query
View public website response status, content type, cache and compressed response headers.https certificate check
View the issuer, validity period, applicable domain name and system trust verification results of the domain name certificate.Website redirect check
Step by step to view the URL jump path, status code and loop jump.robots.txt check
Read the site crawl rules and test whether the crawler can access the target path.Sitemap check
Check the site map xml, statistical addresses, duplicates and a small sample status.Web SEO Basic Check
Check the title, description, H1, Canonical, and Robots information of the public page.Unicode character query
View the code points, UTF-8 bytes, and invisible character descriptions for each character.Regular expression test
Test regular matching, grouping and replacement results, support for timeout termination.cron expression parsing
Preview Cron's future execution time at the specified timezone and explain each field.Bandwidth and download time calculation
Convert Mbps and Mb/s to estimate the time required for downloading files.Web Meta tag generation
Generate a replicable webpage base SEO tag from title, description, and canonical URLs.robots.txt generator
Generate crawler rules according to the Allow and Prohibition paths, and you can attach the sitemap address.Sitemap xml generation
After deduplication, the sitemap xml is generated, which supports local download.Promotion link parameter generation
Add UTM parameters such as source, media, and activity names for URLs and keep other parameters.Text color contrast check
Check the contrast between the text and the background color, and give the WCAG AA and AAA text threshold results.Website Icon Generator
Generate pictures to generate multi-size PNG, ICO and downloadable icons.css gradient code generation
Generate linear gradient CSS based on two colors, transparency and angle.css shadow code generation
Box shadow CSS is generated by offset, blur, diffusion, color and transparency.CSS triangle generation
Generate pure CSS triangle codes based on direction, bottom edge, length and color.css image filter code generation
Combines brightness, contrast, grayscale, blur and hue rotation to output CSS filters.CSS Flexbox Generator
Visualize Flex orientation, alignment and spacing to generate a replicable CSS.CSS Grid Generator
Set the number of grid columns, row height, spacing and first cross column, and view the layout in real time.CSS Border Radius Generator
Adjust the fillet radius of the four corners separately, preview and copy the CSS.Fluid Font Size Generator
Enter the screen and font size range to generate a streaming font size CLAMP expression.Open Graph Tag Generator
Generate web sharing titles, descriptions and image tags, and view text cards.Hreflang Tag Generator and Checker
Generate multilingual association tags based on language and page address, check duplicate or invalid items.network query15
IP, proxy, DNS, network segment and domain name information.
ProxyIP batch detection
Batch detect the connectivity, export IP and time-consuming of HTTP, HTTPS Connect and Socks5Proxy.IPv4 interval to CIDR
Break down the starting and ending IPv4 address intervals into the minimum CIDR network segments that are precisely covered.DNS record query
Query A, AAA, CNAME, MX, NS, TXT, CAA, SOA and PTR records.Does ip belong to the network segment
Compare a set of IPv4 addresses with the specified CIDR network segment, and display whether they match one by one.Proxy IP Connection Detection
Support single or batch detection of HTTP, HTTPS Connect, SOCKS5 Proxy connectivity, delay and export IP.MAC address format conversion
Batch the MAC address format to identify unicast, multicast and local management bits.Common subdomain detection
Quickly check common subdomain prefixes and their public DNS resolution results.IP/CIDR Calculator
Calculate IPv4 and IPv6 segments, address range, mask and number of addresses.IP address format translation
Convert IPv4 and IPv6 canonical formats, integers, hex and binary representations.UserAgent parsing
Identify browsers, operating systems, rendering engines, and device types.Public DNS Daquan
View the IPv4, IPv6 and encrypted DNS addresses of commonly used public recursive DNS.Domain name registration information
Query the domain name registration status, registrar, date, dnssec and name server on this site.IPv4 network segment merge and deduplication
Merge multiple overlapping or adjacent IPv4 segments into the minimum CIDR collection with precise coverage.IPv4 subnet division
Divide an IPv4 segment into equal-large subnets according to a longer prefix, list the scope.IPv4 list sorting and verification
Check the IPv4 list offline, sort by value, deduplicate and mark the wrong line.development tool45
Encoding, data format, timestamp and password tools.
json and csv conversion
Convert between the object array JSON and CSV, support Chinese, quotation marks and newline fields.JWT content analysis
View the JWT header, load and standard time fields locally, and do not upload tokens.URL structure and parameter analysis
Disassemble the URL protocol, host, port, path, anchor point and repeated query parameters.HEX and RGB color conversion
Convert the hex color and RGB to calculate the HSL color value and transparency.Common port query
Filter common network ports by port number, protocol or service name.HTTP status code
Quickly find common HTTP status codes and Chinese meanings.json formatting
Format, compress, and verify JSON locally in the browser.base64 codec
Support for base64 encoding and decoding of Chinese text.url codec
Encode and decode the URL component, and the data will not leave the browser.URL structure analysis
Split protocols, hosts, ports, paths, parameters and fragments locally in the browser.text hash calculation
SHA-256, SHA-384 and SHA-512 summary of texts are computed locally in the browser.UUID batch generation
Generate multiple UUID v4 at a time using the browser safe random number.JWT content analysis
Parse the JWT header, payload and validity period locally in the browser, and do not upload tokens.Timestamp Conversion
Convert between Unix seconds, milliseconds and local datetimes.random password generation
Use the browser safe random number to generate strong passwords, and do not upload to generate results.Query interface description
View the current IP, IP attribution, DNS and subdomain interface examples.json path extraction
Press the object key and array subscript to extract the json data, and the output result is for copy and download.JSON generate TypeScript type
Deriving TypeScript types from JSON samples, supports nested objects, arrays, and junction types.Text and UTF-8 hex conversion
Convert text to UTF-8 byte hex, or restore hex to text.file hash validation
Compute the file SHA-256 abstract locally and compare with the expected digest without uploading the file.JSON object deep merge
Combine the two JSON objects recursively by fields, overriding the same name value on the right.JSON structural difference check
Compare the fields and values of the two JSONs, and list the paths that are added, deleted and modified.JSON string escape and restore
Convert the original text to a JSON string literal, or restore escape characters.HTML Entity Escape and Restore
Convert common special characters and numeric character entities in HTML.Linux file permission conversion
Convert the three-digit octal permission and the RWX symbol permission to each other.Base64 and Hex Converter
Convert between standard base64 and hex byte representations without text decoding.Cookie and JSON Converter
Convert the cookie request header to a JSON string object, or generate a cookie text from the JSON.Query String and JSON Converter
Convert between the URL query string and JSON, and repeat the parameters with the array reserved.HMAC message authentication code calculation
Calculate HMAC-SHA256, SHA384 or SHA512 locally, and output hex authentication codes.CRC32 check calculation
Calculate the CRC32 check value of UTF-8 text, output hex and unsigned decimals.Gzip text compression and restore
Compress UTF-8 text to Gzip represented by base64, or decompress and restore text.Flatten JSON to Pointer Paths
Expand the JSON nested structure into the JSON Pointer path and value, keeping the type of the value.JSON and YAML Converter
Convert between JSON and YAML to check for incompatible data types.XML Formatter and Validator
Check the XML syntax, which supports typography and compressed output for content reserved.JSON Schema Validator
Check JSON according to the common rules of JSON Schema, and display the wrong data path.SQL Formatter
Adjust SQL layout by generic SQL, MySQL or PostgreSQL dialect..env File Checker
Check the environment variable name, duplicate definition and quotation marks, and the result does not display the variable value.NDJSON and JSON Converter
Convert between the ndjson and the json array with one JSON value per line.JSON Field Redaction
Replacing JSON sensitive values recursively by field names, generating a shared desensitized copy.INI and JSON Converter
Convert common INI section configurations with string values JSON objects to each other.ULID Generator and Parser
Bulk generate ULID with millisecond time, or parse ULID time section.HTTP Basic Authentication Encoder and Decoder
Generate or parse HTTP Basic authentication fields natively.Offline HTTP Message Parser
Parsing pasted HTTP/1.0 or HTTP/1.1 requests, responses, and header fields.Semantic Version Comparator
Compare the priorities of the two versions according to Semver 2.0.0.Byte Order Converter and Integer Parser
Invert the hex byte group and read signed or unsigned integers by size.