Qiuyun Tools

JSON beautify, minify, validate

Bidirectional YAML & JSON conversion

Java Properties & YAML conversion

Generate Java POJO from JSON

Multi-language code formatter

Real-time regex matching test

Unix timestamp & date converter

Visual cron expression editor & parser

REST API debugging (limited by CORS)

WebSocket connection debugging

Parse UA for browser/device info

Browser/Screen/WebGL information

Text/file Base64 conversion

URL encode / decode

Text MD5 digest

WebCrypto HMAC signature

JWT Token Payload parser

WebCrypto RSA key pair generation

Character/word/line counter

Remove duplicate lines from text

Highlight differences between two texts

Convert Chinese characters to Pinyin

Custom range / integer / decimal

Binary / Octal / Decimal / Hex

Convert numbers to Chinese uppercase

Expression evaluator

Visual flexbox layout editor

CSS/SCSS/Less beautify & minify

HEX/RGB/HSL color converter

Visual box-shadow editor

Linear/radial gradient editor

Keyframes visual editor

Text/icon to Favicon

Complementary/Triadic/Tetradic schemes

Lossless/lossy image compression

Text/image watermark overlay

PNG/JPG/WebP/GIF converter

Image file & Base64 conversion

Simple visual SVG editor

Text/URL to QR code

Recognize QR code from image

Split-pane editor + live preview

MD to HTML / plain text

Merge multiple PDF files (pure frontend)

Split by range / every N pages / extract pages

Date difference / date addition-subtraction

Custom target time countdown

Body Mass Index calculator

Calculate age from birth date

Length / Weight / Area / Volume

Equal principal & interest / Equal principal

Social insurance + Tax