Top 10 Online Tools Every Developer Needs
Top 10 Online Tools Every Developer Needs
Good tools can double your productivity. Here are 10 essential online dev tools — all free, no registration, ready to use.
1. JSON Formatter — API Debugging Essential
Got a wall of minified JSON from an API and can’t make sense of it? Use a JSON formatter to beautify with a single click, and validate syntax at the same time.
All processing happens in your browser. Your data never leaves your device.
2. Base64 Encoder / Decoder
Working with image uploads or file transfers often requires Base64. This tool handles proper encoding and decoding of text, including Unicode.
Online Base64 Encoder/Decoder →
3. Regular Expression Tester
Not sure if your regex works? Real-time matching with highlighted results and common pattern presets.
4. UUID Generator
Database primary keys, distributed IDs, session tokens — generate UUID v4 with one click, supports batch generation.
5. Text Diff Checker
Compare two versions of code or config files with a standard diff algorithm, line by line.
6. Color Picker
HEX, RGB, HSL conversion with an eyedropper tool for picking colors from your screen.
7. MD5 / SHA Hash Generator
File integrity checks, password hashing — supports MD5, SHA-1, SHA-256.
8. URL Encoder / Decoder
Handle special characters and non-ASCII parameters in URLs.
9. Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates, supporting both second and millisecond precision.
10. Random Password Generator
Uses crypto.getRandomValues() for cryptographically secure random generation. Customize length and character types.
Why ToolZen?
All tools run locally in your browser. Your data never leaves your device. No backend servers, no privacy risks. All tools are free forever.