Free Dev Tools Tools
Developer utilities for everyday coding — encoders, formatters, hash generators, and regex testers that run entirely in your browser.
18 tools · 100% client-side · no login, no uploads
HTML/CSS/JS Minifier
Compress your HTML, CSS, and JavaScript files to reduce size and improve site speed. High-performance minification happens 100% client-side.
Regex Tester
Verify your regular expressions against sample text instantly. A high-performance regex engine that works 100% client-side.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice-versa instantly. Fast, accurate, and 100% client-side processing.
UUID Generator
Generate high-entropy Version 4 UUIDs instantly for your development projects. Secure, local generation ensures absolute identifier privacy.
CSS Minifier
Shrink your CSS code instantly to reduce file size and improve webpage load speed. 100% private, client-side minification node.
UUID Validator
Check if a string is a valid UUID version 1, 3, 4, or 5 instantly. A secure, browser-based utility for data integrity verification.
HTML Entity Encoder/Decoder
Encode or decode HTML entities instantly. Our secure, local tool protects your code from XSS and ensures perfect character rendering.
Regex Generator (AI-assisted)
Generate complex regular expressions from plain English descriptions using AI. A powerful, secure tool for developers and data scientists.
CSS Flexbox Generator
Visually design and generate CSS Flexbox layouts instantly. A high-performance tool for web developers with real-time previews and code export.
Base Conversion (bin/oct/hex)
Convert numbers between binary, octal, decimal, and hexadecimal bases instantly. A fast, accurate, and local tool for computer scientists.
HTML/CSS/JS Playground (live preview)
Write and test your web code instantly with live previews. A powerful, secure environment for front-end developers and students.
Bookmarklet Builder
Transform your JavaScript code into powerful browser bookmarklets instantly. A secure, local tool for enhancing your browsing experience.
OAuth Demo Playground
Master OAuth 2.0 flows with our interactive simulation playground. A secure environment for developers to test and learn authentication protocols.
Email Template Tester
Preview and test your HTML email templates instantly. Verify responsiveness and rendering across different environments with this secure utility.
JSON Web Token (JWT) Decoder
Decode and validate JSON Web Tokens (JWT) instantly. Our secure, local tool ensures your sensitive token data never leaves your browser.
Regex Visualizer
Visualize and debug your regular expressions with interactive diagrams. Master complex regex patterns instantly with 100% private processing.
CSS Grid Layout Generator
Visually design and generate CSS Grid layouts instantly. A high-performance tool for web developers with real-time previews and code export.
Aspect Ratio Calculator
Calculate dimensions and aspect ratios for images, video, and design layouts instantly. A high-performance tool for visual creators.