Developer tools. No uploads.
The everyday utilities — JSON, Base64, JWT, hashes, regex, and more. Every one runs entirely in your browser. Your data never leaves your device.
JSON Formatter
Format, validate, minify, and explore JSON.
Base64 Encode/Decode
Encode and decode Base64 for text and files.
JWT Decoder
Decode and verify JSON Web Tokens.
URL Encoder
Encode, decode, and parse URLs and query strings.
Hash Generator
MD5, SHA-1, SHA-256/384/512 for text and files.
UUID Generator
UUID v4, v7, and Nano ID. Bulk generation.
Regex Tester
Test patterns with live matches and replace.
Cron Expression
Build, explain, and preview cron schedules.
Timestamp Converter
Unix, ISO 8601, and human time across zones.
Color Converter
HEX, RGB, HSL, OKLCH, and contrast checker.
QR Code Reader
Scan and decode QR codes from an image.
Text Diff Checker
Compare two texts line by line.
Password Generator
Strong random passwords and passphrases.
Markdown Editor
Live Markdown preview and editor.
Lorem Ipsum
Placeholder text by words, sentences, paragraphs.
Case Converter
UPPER, lower, Title, camelCase, snake_case, more.