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Fast, free developer tools that run entirely in your browser. Your data never leaves your browser.

64

Base64 Encode / Decode

Convert text to Base64 and back. Full Unicode support.

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JSON Formatter

Format, validate and minify JSON with precise error location.

 %

URL Encode / Decode

Percent-encode or decode URLs and query parameters.

 JWT

JWT Decoder

Decode JWT header & payload, check expiration. Nothing is sent anywhere.

 ID

UUID Generator

Generate UUID v4 — single or in bulk, with formatting options.

 TS

Unix Timestamp Converter

Convert Unix timestamps to human dates and back.

 #

Hash Generator

MD5, SHA-1, SHA-256 and SHA-512 of any text — all at once.

 &;

HTML Entities Encode / Decode

Escape special characters for HTML, or turn & back into &.

 /·/

Regex Tester

Test patterns with live highlighting. Freeze-proof via Web Worker.

 ±

Text Diff

Compare two texts line by line — see exactly what changed.

 🎨

Color Converter

HEX ↔ RGB ↔ HSL, with a live preview and color picker.

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Password Generator

Strong random passwords with your rules — length, symbols, count.

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