devtoolkit.fyi
Fast, privacy-focused developer utilities
All tools run entirely in your browser. No data is sent to our servers. No tracking. No ads.
JSON Formatter & Validator
Format, validate, and minify JSON with syntax highlighting
Base64 Encoder/Decoder
Convert text to Base64 and back with UTF-8 support
UUID Generator
Generate RFC4122 compliant UUIDs in bulk
Hash Generator
Create MD5, SHA-1, SHA-256, and SHA-512 hashes
URL Encoder/Decoder
Encode and decode URL components safely
Why devtoolkit.fyi?
Privacy First
All processing happens in your browser. No data ever leaves your device.
Lightning Fast
No server round-trips. Instant results with minimal JavaScript.
Simple & Clean
No clutter, no distractions. Just the tools you need.
Free Developer Utilities for Daily Tasks
devtoolkit.fyi provides a curated collection of essential developer tools that respect your privacy. Whether you're formatting JSON responses, encoding data for APIs, generating unique identifiers, or creating hashes, our tools are designed to be fast, reliable, and completely client-side.
Privacy-Focused Design
Unlike other online tool sites, we never send your data to our servers. Every tool runs entirely in your browser using modern JavaScript APIs. This means your sensitive data stays on your device, making our tools safe for working with production data, API keys, or any confidential information.
Perfect for Developers
Our tools are built by developers, for developers. Each utility is designed to solve common daily tasks with minimal friction. No sign-ups, no ads, no tracking—just bookmark and use whenever you need them.