For Developers

Free Developer Tools

Fast, private utilities that every developer uses daily — JSON, SQL, regex, timestamps, mocks, gitignore, and more. Everything runs locally in your browser.

JSON Formatter

Beautify, minify, and validate JSON with error highlighting.

Base64 Encoder / Decoder

Convert text and files to and from Base64.

JWT Decoder

Decode and inspect JSON Web Tokens instantly.

JWT Encoder

Create and sign valid JSON Web Tokens (HS256/384/512).

Regex Tester

Test regular expressions with live match highlighting.

Regex Generator

Generate accurate patterns from positive & negative examples.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes for text and files.

Color Contrast Checker

Check WCAG AA/AAA contrast compliance with live preview.

SQL Formatter & Minifier

Beautify or compress SQL queries with dialect hints.

API Response Mock Generator

Realistic mock JSON + ready-to-use fetch/curl/axios snippets.

Timestamp Converter

Unix, ISO, human readable + 15+ timezones with live now.

Base64 Image Optimizer

Resize, compress and re-encode base64 images for the web.

Git Ignore Generator

Curated .gitignore templates for 30+ languages & frameworks.

URL Encoder / Decoder

Encode and decode URL components safely.

Built for Speed and Privacy

Every developer tool on QuickUtils runs entirely in your browser. Paste sensitive tokens, JSON payloads, regex, or base64 images without worrying about them being stored or transmitted. New additions include realistic API mocking, powerful SQL formatting, example-driven regex, full timestamp conversion, base64 image optimization, and a rich gitignore builder.