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Popular Tools

44 tools · all client-side
JSON Formatter
Format / Minify / Validate
Developer
Base64 Encoder
UTF-8 safe encode/decode
Developer
URL Encoder
Encode / Decode / Parse
Developer
Regex Tester
Live match highlight
Developer
UUID Generator
Web Crypto random
Developer
CSV ↔ JSON
Convert both ways
Developer
Hash Calculator
MD5 / SHA-1/256/512
Developer
Markdown Preview
Live preview
Text
Text Stats
Chars / Words / Lines
Text
Case Converter
camel / snake / kebab
Text
QR Generator
Pure client-side
Image
Image Compress
Local canvas compress
Image
Unit Converter
length / weight / temp / data
Convert
Timestamp Converter
timestamp ↔ date
Time
Password Generator
Web Crypto random
Security
JWT Debugger
Decode + local HMAC verify
Developer
AES Encryptor
AES-GCM text / files
Security
Text Diff
Line-level diff highlight
Text
Timer & Stopwatch
Countdown / Stopwatch / Pomodoro
Time
RMB Capitalization
Amount to Chinese words
Convert
JSON to TypeScript
Generate interfaces
Developer
Date Calculator
Gap / Add / Workdays
Time
Base Converter
Bases 2-36 · BigInt exact
Convert
Image ⇄ Base64
Image ⇄ data URL
Image
Cron Parser
Parse + next runs
Developer
IP Subnet Calculator
Network / mask / hosts
Developer
简繁 Converter
OpenCC dictionary
Text
QR Reader
Decode QR from image
Image
EXIF Viewer & Stripper
Read / strip metadata
Image
Webcam Capture
Countdown capture
Image
Screen Recorder
Record to WebM
Developer
Text to Speech
Local system voices
Text
YAML ↔ JSON
Convert both ways
Developer
Barcode Generator
CODE128 / EAN / ITF
Convert
Finance Calculator
Compound / SIP / Grid
Life
CSS Generator
Box shadow / gradient
Developer
Morse Code
Convert + audio play
Convert
World Clock
Multi-city live time
Time
Placeholder Image
Instant SVG / PNG
Developer
Gzip Test
Native CompressionStream
Developer
HTTP Client
Browser-direct · API debug
Developer
Color Converter
HEX / RGB / HSL
Developer
SQL Formatter
Keyword wrap + indent
Developer
HMAC Calculator
MD5 / SHA-1/256/512
Developer