Free Online Developer Tools

Fast, secure, and client-side utilities for coding and debugging. Format code, encode strings, and generate hashes instantly. Zero tracking. No registration required.

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We're currently preparing high-quality tools for this category. Please check back soon or explore other tool categories.

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Essential Utilities for Programmers

🔐 Hash, Encode & Decode

Keep your data parsing quick. Inspect payloads with our JWT Decoder, handle strings using the Base64 Decoder, or generate secure strings with the SHA-256 Generator and URL Encode Decode tool.

⚙️ Format & Generate

Speed up your workflow. Need a unique identifier? Use the UUID Generator. Working on UI? Generate layouts with our CSS Grid Generator and Flexbox Generator, or clean code with the SQL Formatter.

🔎 Regex, Data & Timestamps

Debug without limits. Master expressions using the Regex Tester, convert epochs effortlessly with the Unix Timestamp Converter, or translate systems via Hex to RGB and ASCII to Text converters.

Why Developers Choose TestsAndTools

Security & Environment Tests & Tools 🚀 Typical Dev Sites
Processing Privacy 100% Client-Side JS API/Server-Side execution
Performance Instant (Zero Latency) Network dependent
Account Access No Login Required Paywalls or Captchas
UI / Theme Native Dark Mode Blinding Light Mode

Frequently Asked Questions

Are my hashes and decoded tokens stored on your server?
No. Tools like the JWT Decoder, Base64 Encoder, and SHA-256 Generator execute strictly in your browser. We do not transmit, log, or store your tokens, source code, or generated hashes.
Do the UI generation tools output standard code?
Yes, our CSS Grid Generator and Flexbox Generator create clean, standard, and responsive CSS rules that you can directly copy and paste into your stylesheets or modern frontend frameworks.
Is the Regex Tester compatible with different engines?
Our Regex Tester relies on the standard JavaScript RegExp engine running directly in your browser. It accurately tests flags (g, i, m) and matches syntax compatible with modern web environments.
Can I use these developer tools offline?
Because processing happens client-side, many of these tools (like the UUID Generator or Unix Timestamp Converter) will continue to function on a loaded page even if your internet connection temporarily drops.