Free Online Developer Tools
What We Do
ToolsForDevelopers provides free, browser-based utilities for developers: JSON formatting, Base64 encoding, UUID generation, URL encoding, and cryptographic hashing. Every tool runs entirely in your browser. No data is uploaded, no accounts required. We also publish guides that explain when and how to use each tool, with practical examples and CLI alternatives.
Available Tools
Click on any tool to get started
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting and error detection.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to plain text instantly.
UUID Generator
Generate random UUIDs (v4) in various formats. Create multiple UUIDs at once.
URL Encoder/Decoder
Encode or decode URL strings using encodeURIComponent or encodeURI methods.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
Guides
Learn best practices and common pitfalls. Each guide links to the matching tool.
Browse GuidesWhy ToolsForDevelopers?
Lightning Fast
All tools run directly in your browser. No server round-trips, no waiting.
Privacy First
Your data never leaves your browser. We don't collect, store, or transmit anything.
Always Free
No signup required. No premium tiers. All tools are free, forever.