20+ free developer tools

Developer Tools Hub

Fast, private, and free utilities that run entirely in your browser. No sign-up. No server. Just tools.

Featured Tools

Format, minify, and beautify JSON with syntax highlighting.

Validate JSON syntax with detailed error messages and line numbers.

Decode JWT tokens to view header, payload, and expiration.

Encode and decode text to and from Base64 format.

Generate UUID v4 identifiers in bulk.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Test regular expressions with match highlighting and flags.

Password Generator

Generate secure passwords with customizable options.

All Tools by Category

Data & JSON

Format, minify, and beautify JSON with syntax highlighting.

Validate JSON syntax with detailed error messages and line numbers.

Encoding & Decoding

Encode and decode text to and from Base64 format.

Encode and decode URL components safely.

Security

Decode JWT tokens to view header, payload, and expiration.

Password Generator

Generate secure passwords with customizable options.

Generate MD5, SHA1, SHA256, and SHA512 hashes.

Text Tools

Test regular expressions with match highlighting and flags.

Text Diff Checker

Compare two texts and highlight differences.

Convert text between camelCase, snake_case, kebab-case, and more.

Code Formatters

Beautify and minify SQL queries.

Beautify and minify HTML markup.

Beautify and minify CSS stylesheets.

JavaScript Formatter

Beautify and minify JavaScript code.

Generators

Generate UUID v4 identifiers in bulk.

Lorem Ipsum Generator

Generate placeholder text by paragraphs or word count.

QR Code Generator

Generate QR codes and download as PNG images.

Utilities

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Cron Expression Generator

Build cron expressions with human-readable explanations.

Color Converter

Convert colors between HEX, RGB, and HSL formats.