Free Online Developer Tools

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JSON Formatter & Validator

Format, validate and minify JSON online. Paste messy JSON and get it beautifully indented instantly.

JWT

JWT Decoder

Decode and inspect JSON Web Tokens instantly. See header, payload and signature without a secret key.

B64

Base64 Encoder & Decoder

Encode and decode Base64 strings and files online. Supports text, URLs and binary data.

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Regex Tester — JavaScript & Python

Test regular expressions online with real-time match highlighting. Supports JavaScript and Python regex syntax.

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Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds and multiple timezones.

SQL

SQL Formatter & Beautifier

Format and beautify SQL queries online. Supports SELECT, INSERT, UPDATE, DELETE and complex JOINs.