Developer Tools, Simplified
Free, fast, and privacy-friendly. All processing happens in your browser — no data is sent to any server.
JSON formatter · Base64 encoder · JWT debugger · Hash generator · Color converter · Regex tester · Markdown preview · and more
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting
Base64 Encoder
Encode and decode Base64 strings and files instantly
JWT Debugger
Decode and inspect JWT tokens with expiry tracking
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files
Color Converter
Convert between HEX, RGB, HSL colors and find Tailwind matches
Regex Tester
Test regular expressions with real-time match highlighting
Markdown Preview
Write and preview Markdown with instant rendering
Lorem Ipsum
Generate placeholder text by paragraphs, sentences, or words
URL Encoder
Encode and decode URL components safely
UUID Generator
Generate random UUID v4 identifiers in bulk
100% Private
All processing happens locally in your browser. Zero data sent to servers.
Lightning Fast
No server round-trips. Instant results every time.
Always Free
No signup, no limits, no catch. Just tools that work.
About DevUtils — Free Online Developer Tools
DevUtils is a collection of free online developer tools designed to make your workflow faster and easier. Whether you need to format JSON data, encode Base64 strings, debug JWT tokens, generate hash values, convert colors, test regex patterns, preview Markdown, or generate placeholder text — we've got you covered.
Every tool runs entirely in your browser using client-side JavaScript. This means your data never leaves your device — no server processing, no data collection, no privacy concerns. Just fast, reliable developer utilities available 24/7.
Popular tools: JSON Formatter and Validator is our most-used tool, helping thousands of developers format, minify, and validate JSON data daily. The Base64 Encoder/Decoder supports both text and file encoding. The JWT Debugger provides instant token inspection with expiry tracking. The Hash Generator creates MD5, SHA-1, SHA-256, and SHA-512 hashes using the Web Crypto API.
For designers: The Color Converter tool supports HEX, RGB, HSL conversions and finds the closest Tailwind CSS color match. Generate shade palettes with a single click.
Built with ❤️ for developers, by developers. Open source on GitHub.
Frequently Asked Questions
Is DevUtils really free?
Yes! All tools are completely free to use with no registration required. There are no hidden fees or premium tiers.
Is my data safe?
Absolutely. All processing happens in your browser using client-side JavaScript. Your data never gets sent to any server. You can even use DevUtils offline once loaded.
What tools are available?
We offer 10 essential developer tools: JSON Formatter, Base64 Encoder/Decoder, JWT Debugger, Hash Generator, Color Converter, Regex Tester, Markdown Preview, Lorem Ipsum Generator, URL Encoder/Decoder, and UUID Generator.
Support DevUtils
Help us keep these tools free and ad-light. Buy us a coffee!
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