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Developer Tools

12 tools

Daily-use developer utilities. Format JSON, decode JWTs, test regex, generate hashes and UUIDs, convert colors, and diff text — all client-side so secrets never touch a server.

JSON Formatter

Format, validate, and minify JSON. With error highlighting. Runs in your browser.

JWT Decoder

Decode JWT tokens to view the header and payload. Tokens never leave your device.

Base64 Encoder

Encode text to Base64 or decode Base64 back to text. UTF-8 safe.

URL Encoder

Percent-encode and decode URLs and query strings.

Regex Tester

Test regular expressions with live match highlighting and capture groups.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text in your browser.

UUID Generator

Generate one or many UUID v4 strings instantly. Cryptographically random.

Lorem Ipsum

Generate paragraphs, sentences, or words of placeholder text.

Color Converter

Convert and pick colors across HEX, RGB, and HSL.

Markdown Editor

Write Markdown with side-by-side live preview. Saves locally.

Diff Checker

Compare two text snippets and view differences side-by-side.

Cron Parser

Parse cron expressions into human language and see next run times.

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