Free Online Developer Tools

MushTools offers a growing collection of fast, privacy-friendly utilities that run entirely in your browser. No sign-ups, no tracking, no data leaves your device.

Text Tools 2 tools

JSON Formatter

Beautify, validate, and minify JSON data with clear error messages and one-click copy.

Base64 Encode / Decode

Convert text to Base64 and decode Base64 strings back to readable text instantly.

Generators 3 tools

UUID Generator

Generate one or multiple RFC 4122 v4 UUIDs with individual copy buttons and bulk export.

QR Code Generator

Create QR codes from any text or URL and download them as PNG images — fully offline.

Password Generator

Create strong, random passwords with custom length, character sets, and a strength meter.

Converters 1 tool

Base64 Converter

Encode and decode Base64 strings for data URIs, API tokens, and more.

Web Developer Tools 2 tools

JSON Validator & Formatter

Validate API responses, format nested JSON, and catch syntax errors before they reach production.

UUID Generator

Generate unique identifiers for database records, API keys, session tokens, and testing.