New tools

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Text DiffNEW

Compare two texts line by line with highlighted differences

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Regex TesterNEW

Test regular expressions online with live highlighting and capture groups

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Subnet CalculatorHOTNEW

Enter an IP and mask to get the network address, broadcast address and usable host range

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URL ParserHOTNEW

Split a URL into scheme, host, port, path, query and fragment, then drop parameters and rebuild

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User-Agent ParserNEW

Parse a UA string into browser, engine, operating system, device and crawler

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UTM Link BuilderHOTNEW

Fill the five utm fields, pick from 18 channel presets, then get an encoded link with naming warnings

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Random Password GeneratorNEW

Generate strong random passwords with custom length and character sets

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Chinese ConverterNEW

Convert between Simplified and Traditional Chinese, including Taiwan and Hong Kong usage

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JSON ViewerHOTNEW

Explore JSON as a collapsible tree with search, formatting and minifying

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Image ResizerHOTNEW

Resize images online in PNG, JPG, WebP, GIF and BMP formats

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Image CompressorHOTNEW

Compress images online in PNG, JPG and WebP, with batch processing

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Image Format ConverterHOTNEW

Convert PNG, JPG and WebP online with batch mode, quality control and background fill, no upload

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Image CropperHOTNEW

Crop images online by dragging a selection, with ratio presets and exact pixel input

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Rotate and Flip ImagesHOTNEW

Rotate and mirror images online with 90 degree shortcuts, fine angles and flips

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App Store Screenshot MakerHOTNEW

Create app store screenshots with device mockups, custom backgrounds and captions

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Image WatermarkHOTNEW

Add text or image watermarks online with drag positioning, rotation and tiling

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Image MosaicHOTNEW

Blur parts of an image with a mosaic, by selection or full frame, with adjustable block size

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GIF Frame ExtractorHOTNEW

Split animated GIFs into still frames with previews, single downloads and a ZIP export

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Images to GIFHOTNEW

Turn several images into an animated GIF with drag sorting, custom frame delays and live preview

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Photo CollageHOTNEW

Combine photos into creative layouts: heart, grid, circle, diamond and more

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Perler Bead Pattern MakerHOTNEW

Turn photos into perler bead patterns with palette matching, color counts and manual editing

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SVG PreviewNEW

Preview SVG files or pasted code with zoom, syntax highlighting and live rendering

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SVG ConverterNEW

Convert SVG to PNG, JPG or WebP online with custom size, quality control and one-click download

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Image to SVGNEW

Wrap PNG, JPG or WebP images in SVG with embedded encoding for scaling without blur, one-click download

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GCD CalculatorHOTNEW

Compute the greatest common divisor of several integers with the Euclidean steps shown

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LCM CalculatorHOTNEW

Compute the least common multiple of several integers with the working and prime factorisation

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Factorial CalculatorNEW

Calculate factorials of non-negative integers, including large results, or list a range

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Fraction CalculatorHOTNEW

Add, subtract, multiply and divide fractions with common-denominator and reduce steps

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Fraction SimplifierNEW

Reduce fractions to lowest terms with the GCD steps shown, in bulk

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Common Denominator CalculatorNEW

Find the least common denominator for several fractions and show each conversion

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Arithmetic Sequence CalculatorNEW

Generate an arithmetic sequence, sum it, or solve backwards, with formulas and steps

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Geometric Sequence CalculatorNEW

Generate a geometric sequence, sum it, or solve backwards, with formulas and steps

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Permutation CalculatorNEW

Compute permutations A(n,r), list all arrangements, and show the formula

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Combination CalculatorNEW

Compute combinations C(n,r), list every subset, and show the formula

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Text Set OperationsNEW

Intersect, subtract and union two text lists, with dedupe and case options

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Decimal FormatterNEW

Round, truncate, pad or group decimals in bulk across pasted text

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Time CalculatorNEW

Add or subtract days, hours, minutes and seconds, or measure the gap between two times

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Hash CalculatorHOTNEW

Compute MD5, SHA1, SHA256 and SHA512 hashes, with HMAC and file hashing

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UUID GeneratorNEW

Generate UUIDs in bulk with v4 random and v1 timestamp versions

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Unicode ConverterNEW

Convert between Chinese text and Unicode escapes in hex or decimal form

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Number Base ConverterHOTNEW

Convert numbers between bases 2 and 36, including huge values and text encoding

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JSON to ExcelNEW

Convert JSON data into a spreadsheet with table preview and CSV download

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Excel to JSONNEW

Convert Excel data to JSON by pasting tab-separated text

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JSON to PHPNEW

Convert JSON data into PHP array code, with array and object syntax

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JSON to CSVNEW

Convert JSON arrays into CSV with custom delimiters and download

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JavaScript FormatterHOTNEW

Beautify or minify JavaScript with indentation options and comment control

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CSS FormatterNEW

Beautify or minify CSS with indentation options and size statistics

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HTML FormatterNEW

Beautify or minify HTML with tag indentation and size statistics

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HTML Tag StripperNEW

Strip HTML tags and keep plain text, with optional tag filtering

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HTML Entity EncoderNEW

Encode and decode HTML entities, and turn HTML into JavaScript strings

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Text EncoderNEW

Convert text to binary, ASCII, full-width and half-width forms in one tool

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Crontab ParserNEW

Parse cron expressions, preview the next runs and use common presets

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Text Sort and DedupeHOTNEW

Sort, deduplicate and extract duplicate lines from text lists

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Text ExtractorHOTNEW

Extract phone numbers, emails, URLs, IP addresses, ID numbers and digits in bulk

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Batch Find and ReplaceNEW

Apply multiple find-and-replace rules at once, with regex and case sensitivity

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Text CleanerHOTNEW

Clean text in bulk: trim spaces, drop blank lines, remove line breaks and HTML tags

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Line OperationsNEW

Bulk line edits: delete or truncate characters, add prefixes and suffixes, number lines

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Chinese to PinyinNEW

Turn Chinese characters into pinyin with tones, initials or aligned output

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Number to ChineseHOTNEW

Convert numbers to Chinese numerals and financial uppercase in bulk

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Text ShuffleNEW

Randomly shuffle the characters or lines of a text

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Lorem Ipsum GeneratorNEW

Generate Lorem Ipsum placeholder text in Latin or Chinese

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Split and Merge ColumnsNEW

Split, merge and build Cartesian products from text columns with custom delimiters

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Text Frequency CounterNEW

Count character, English word and keyword frequencies in a text

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Privacy MaskingHOTNEW

Detect and mask phone numbers, emails, ID numbers, bank cards and other private data

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QR Code GeneratorHOTNEW

Generate QR codes with logo embedding, gradients, dot shapes, corner styles and SVG export

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Barcode GeneratorHOTNEW

Generate CODE128, EAN-13 and CODE39 barcodes with custom colors and sizes

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QR Code DecoderNEW

Upload an image to read QR code content such as URLs, text and WiFi settings

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Barcode DecoderNEW

Upload an image to read barcodes such as CODE128, EAN-13 and CODE39

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File Hash CalculatorNEW

Compute MD5, SHA-1 and SHA-256 hashes for many files at once with drag and drop

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File Info ReaderNEW

Read file name, size, type and modification time for many files at once

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Text File ReaderNEW

Open txt, json, csv and xml files in the browser with encoding selection

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Random File PickerNEW

Pick a set number of files at random from an uploaded list

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Filename ExtractorNEW

Extract filenames from full paths in bulk, Windows and Unix styles

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Filename and Extension SplitterNEW

Split base names from extensions in bulk, including compound extensions

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Extension Case ConverterNEW

Change extension case in bulk: all upper, all lower or capitalised

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File Size GeneratorNEW

Create a test file of an exact size in KB, MB or GB with custom content

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File to Base64NEW

Encode any file as Base64: images, audio and arbitrary binary data

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Text MergerNEW

Merge several text files into one with custom separators and ordering

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Text SplitterNEW

Split a large text file by line count, size or delimiter into smaller files

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Folder Batch CreatorNEW

Generate a BAT, Shell or PowerShell script that creates many folders at once

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Period CalculatorHOTNEW

Predict your next period, ovulation day and fertile window from your last period and cycle length

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Countdown TimerNEW

Set a target date and watch a live countdown in days, hours, minutes and seconds

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World ClockNEW

See the current time in major cities worldwide, with time zone comparison and offsets

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Holiday CountdownNEW

Count down to Chinese public, lunar and solar-term holidays

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Ganzhi CalendarNEW

Convert a Gregorian date into the sexagenary year, month, day and hour pillars plus the zodiac animal

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BMR CalculatorNEW

Calculate basal metabolic rate with Mifflin-St Jeor and Harris-Benedict, plus TDEE and macros

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BMI CalculatorHOTNEW

Calculate body mass index and compare it against WHO and Chinese standards

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Kinship CalculatorNEW

Build a chain of relatives and get the correct Chinese kinship term in both directions

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Body Fat CalculatorNEW

Estimate body fat percentage from measurements and see lean body mass

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Password StrengthNEW

Rate password strength, analyse the character mix, and estimate cracking time

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Mortgage CalculatorHOTNEW

Calculate monthly payments, total interest and full amortization schedules, comparing equal-payment and equal-principal loans

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Income Tax CalculatorHOTNEW

Calculate monthly salary withholding and annual tax, and compare the two ways of taxing a year-end bonus

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Unit ConverterHOTNEW

Convert ten categories of units in one view: length, weight, area, volume, temperature, speed, time, storage, pressure and power

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Chinese ID Number CheckerHOTNEW

Validate the check digit of an 18-digit Chinese ID and read province, birth date, sex and age

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Bank Card ValidatorHOTNEW

Run a digit-by-digit Luhn check, identify the card network and suggest the correct last digit

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Morse Code TranslatorNEW

Convert text to Morse code and back, with a reference table and adjustable audio

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Lucky WheelHOTNEW

Spin a weighted wheel with custom options and remove winners between draws

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JWT DecoderNEW

Decode JWT headers and payloads, explain each claim and verify signatures locally

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Percentage CalculatorHOTNEW

Percent of a total, percentage change, discounts and tax, each with the formula shown

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Age CalculatorHOTNEW

Calculate exact age, lunar nominal age, zodiac, days lived and a birthday countdown

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Compound Interest CalculatorHOTNEW

Project compound growth with contributions, compare effective rates, CAGR and the rule of 72, and solve for term, principal or rate

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GPA CalculatorHOTNEW

Weighted GPA from credits and grades, five scales, custom thresholds, letter grades and target GPA

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Scientific CalculatorHOTNEW

Expression calculator with powers, factorials, trig, logs, DEG/RAD, Ans memory and batch evaluation

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CSS Gradient GeneratorHOTNEW

Visually build linear, radial and conic CSS gradients with editable stops, six output formats and text contrast checks

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Running Pace CalculatorHOTNEW

Convert between distance, time and pace, with split tables, negative-split plans and milestone times

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Certificate Fingerprint ExtractorNEW

Read .cer, .crt, .pem, .der and .p7b certificates, compute MD5, SHA-1 and SHA-256 fingerprints, export the SPKI key and decode extensions

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Privacy Policy GeneratorNEW

Generate a privacy policy or terms of service from your data practices, third-party SDKs and pricing, then export as text, Markdown or HTML

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Batch File RenamerHOTNEW

Rename thousands of files with templates and numbering, preview every row, auto-resolve collisions, then download a ZIP or a rename script

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EXIF Viewer and RemoverHOTNEW

Read camera model, shooting settings, GPS location and embedded thumbnails, strip all metadata or GPS only, with batch and ZIP download

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TOTP GeneratorHOTNEW

Turn a Base32 secret into the same 6-digit code as your phone authenticator, computed offline in JavaScript with HOTP, code lookup and clock drift checks

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JSON to Code GeneratorHOTNEW

Generate TypeScript, Java, C#, Go, Python and Dart data classes plus JSON Schema from JSON samples, with nullability and type conflict inference

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SQL Formatter and MinifierHOTNEW

Format SQL with a custom lexer: clause breaks, layered JOIN and CASE indentation, IN wrapping and safe single-line minification

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Markdown to HTMLHOTNEW

Live Markdown to HTML with tables, task lists, fenced code, heading anchors and a table of contents, with copy and download

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Workday CalculatorHOTNEW

Count workdays between dates, find the date N workdays away, and build monthly calendars with custom weekends and holidays

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YAML to JSON ConverterHOTNEW

Two-way YAML and JSON conversion with block indentation, flow collections, block scalars, anchors and multiple documents