Popular tools
58 tools
JSON FormatterHOT
Format, minify and validate JSON online with a tree view and error positions
URL Encoder and DecoderHOT
Encode and decode URLs online, including non-ASCII text and special characters
Base64 Encoder and DecoderHOT
Encode and decode Base64 text or images, including files to Base64
MD5 HashHOT
Generate MD5 hashes in 16 or 32 characters, upper or lower case, with batch input
Timestamp ConverterHOT
Convert between Unix timestamps and dates down to milliseconds, with time zones
IP LookupHOT
Look up the location and ISP behind any IP address, IPv4 and IPv6 included
Subnet CalculatorHOTNEW
Enter an IP and mask to get the network address, broadcast address and usable host range
URL ParserHOTNEW
Split a URL into scheme, host, port, path, query and fragment, then drop parameters and rebuild
UTM Link BuilderHOTNEW
Fill the five utm fields, pick from 18 channel presets, then get an encoded link with naming warnings
JSON ViewerHOTNEW
Explore JSON as a collapsible tree with search, formatting and minifying
Image ResizerHOTNEW
Resize images online in PNG, JPG, WebP, GIF and BMP formats
Image CompressorHOTNEW
Compress images online in PNG, JPG and WebP, with batch processing
Image Format ConverterHOTNEW
Convert PNG, JPG and WebP online with batch mode, quality control and background fill, no upload
Image CropperHOTNEW
Crop images online by dragging a selection, with ratio presets and exact pixel input
Rotate and Flip ImagesHOTNEW
Rotate and mirror images online with 90 degree shortcuts, fine angles and flips
App Store Screenshot MakerHOTNEW
Create app store screenshots with device mockups, custom backgrounds and captions
Image WatermarkHOTNEW
Add text or image watermarks online with drag positioning, rotation and tiling
Image MosaicHOTNEW
Blur parts of an image with a mosaic, by selection or full frame, with adjustable block size
GIF Frame ExtractorHOTNEW
Split animated GIFs into still frames with previews, single downloads and a ZIP export
Images to GIFHOTNEW
Turn several images into an animated GIF with drag sorting, custom frame delays and live preview
Photo CollageHOTNEW
Combine photos into creative layouts: heart, grid, circle, diamond and more
Perler Bead Pattern MakerHOTNEW
Turn photos into perler bead patterns with palette matching, color counts and manual editing
GCD CalculatorHOTNEW
Compute the greatest common divisor of several integers with the Euclidean steps shown
LCM CalculatorHOTNEW
Compute the least common multiple of several integers with the working and prime factorisation
Fraction CalculatorHOTNEW
Add, subtract, multiply and divide fractions with common-denominator and reduce steps
Hash CalculatorHOTNEW
Compute MD5, SHA1, SHA256 and SHA512 hashes, with HMAC and file hashing
Number Base ConverterHOTNEW
Convert numbers between bases 2 and 36, including huge values and text encoding
JavaScript FormatterHOTNEW
Beautify or minify JavaScript with indentation options and comment control
Text Sort and DedupeHOTNEW
Sort, deduplicate and extract duplicate lines from text lists
Text ExtractorHOTNEW
Extract phone numbers, emails, URLs, IP addresses, ID numbers and digits in bulk
Text CleanerHOTNEW
Clean text in bulk: trim spaces, drop blank lines, remove line breaks and HTML tags
Number to ChineseHOTNEW
Convert numbers to Chinese numerals and financial uppercase in bulk
Privacy MaskingHOTNEW
Detect and mask phone numbers, emails, ID numbers, bank cards and other private data
QR Code GeneratorHOTNEW
Generate QR codes with logo embedding, gradients, dot shapes, corner styles and SVG export
Barcode GeneratorHOTNEW
Generate CODE128, EAN-13 and CODE39 barcodes with custom colors and sizes
Period CalculatorHOTNEW
Predict your next period, ovulation day and fertile window from your last period and cycle length
BMI CalculatorHOTNEW
Calculate body mass index and compare it against WHO and Chinese standards
Mortgage CalculatorHOTNEW
Calculate monthly payments, total interest and full amortization schedules, comparing equal-payment and equal-principal loans
Income Tax CalculatorHOTNEW
Calculate monthly salary withholding and annual tax, and compare the two ways of taxing a year-end bonus
Unit ConverterHOTNEW
Convert ten categories of units in one view: length, weight, area, volume, temperature, speed, time, storage, pressure and power
Chinese ID Number CheckerHOTNEW
Validate the check digit of an 18-digit Chinese ID and read province, birth date, sex and age
Bank Card ValidatorHOTNEW
Run a digit-by-digit Luhn check, identify the card network and suggest the correct last digit
Lucky WheelHOTNEW
Spin a weighted wheel with custom options and remove winners between draws
Percentage CalculatorHOTNEW
Percent of a total, percentage change, discounts and tax, each with the formula shown
Age CalculatorHOTNEW
Calculate exact age, lunar nominal age, zodiac, days lived and a birthday countdown
Compound Interest CalculatorHOTNEW
Project compound growth with contributions, compare effective rates, CAGR and the rule of 72, and solve for term, principal or rate
GPA CalculatorHOTNEW
Weighted GPA from credits and grades, five scales, custom thresholds, letter grades and target GPA
Scientific CalculatorHOTNEW
Expression calculator with powers, factorials, trig, logs, DEG/RAD, Ans memory and batch evaluation
CSS Gradient GeneratorHOTNEW
Visually build linear, radial and conic CSS gradients with editable stops, six output formats and text contrast checks
Running Pace CalculatorHOTNEW
Convert between distance, time and pace, with split tables, negative-split plans and milestone times
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
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
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
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
SQL Formatter and MinifierHOTNEW
Format SQL with a custom lexer: clause breaks, layered JOIN and CASE indentation, IN wrapping and safe single-line minification
Markdown to HTMLHOTNEW
Live Markdown to HTML with tables, task lists, fenced code, heading anchors and a table of contents, with copy and download
Workday CalculatorHOTNEW
Count workdays between dates, find the date N workdays away, and build monthly calendars with custom weekends and holidays
YAML to JSON ConverterHOTNEW
Two-way YAML and JSON conversion with block indentation, flow collections, block scalars, anchors and multiple documents