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Free Online Tools for Developers & Productivity

ToolZone is a curated collection of 20 free online tools for developers, designers, writers, and everyday productivity. Every tool runs entirely in your browser — no signup, no uploads, no tracking. Your data never leaves your device.

Format and validate JSON, generate strong passwords, encode and decode Base64 or URLs, test regular expressions, convert colors, build CSS gradients, calculate BMI or age, generate Lorem Ipsum, hash text with MD5 or SHA-256, and more — all from a single fast, private, dark-themed workspace.

Whether you're a developer needing quick utilities, a designer working with colors and gradients, or a writer counting words and characters, ToolZone gives you instant, ad-free access to professional-grade web tools that work offline once loaded.

Free Regex Tester — Live Match Highlighting

Build and debug JavaScript regular expressions with real-time feedback. Type your pattern, set flags (global, case-insensitive, multiline, dotAll, unicode), paste sample text and see every match highlighted instantly with a count.

Features

How to use

  1. Step 1. Enter your regex pattern (without surrounding slashes).
  2. Step 2. Add flags if needed (g, i, m, s, u).
  3. Step 3. Paste sample text — matches highlight automatically.

Frequently Asked Questions

Which regex flavour does it support?

JavaScript's native RegExp engine, so anything that works in Node.js or the browser works here. Lookbehinds and named groups are supported in modern browsers.

Why is my pattern slow?

Catastrophic backtracking, usually from nested quantifiers like (a+)+. Refactor with atomic patterns or possessive quantifier equivalents.

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