About codetools.run
codetools.run is a collection of 68 free online developer tools built for speed and privacy. Every tool runs 100% in your browser. No data is ever sent to a server, no accounts needed, no tracking beyond basic analytics.
Privacy First
Every tool processes data entirely in your browser. Nothing is ever sent to a server. Your code, tokens and data stay on your machine.
Instant and Fast
No loading spinners, no waiting for server responses. All tools run locally using native browser APIs for maximum speed.
Free and Open
All tools are completely free with no usage limits, no sign-ups and no premium tiers. Supported by unobtrusive ads.
Secure by Design
Hash generation uses the native Web Crypto API. Markdown is sanitized with DOMPurify. No eval(), no external data calls.
What We Offer
We currently offer 68 tools across 7 categories, covering the most common tasks in a developer's daily workflow:
Base64 Encoder / Decoder, URL Encoder / Decoder, HTML Entity Encoder / Decoder, Image to Base64 Converter, String Escape & Unescape
JSON Formatter & Validator, SQL Formatter & Beautifier, CSS Minifier / Beautifier, JSON Path Tester, JavaScript Minifier & Beautifier, HTML Formatter & Beautifier, CSS Formatter & Beautifier, HTML Minifier
UUID Generator, Password Generator, QR Code Generator, Lorem Ipsum Generator, URL Slug Generator, Chmod Calculator, Meta Tag Generator, robots.txt Generator, Code Screenshot Generator, Favicon Generator, Open Graph Preview, Markdown Table Generator, Google SERP Preview
Unix Timestamp Converter, JSON to CSV Converter, YAML to JSON Converter, XML to JSON Converter, JSON to TypeScript, Color Converter, HTML to Markdown Converter, Number Base Converter, CSV to JSON Converter, SVG to PNG Converter, Text to Binary Converter, Tailwind to CSS Converter, JSON Schema Generator, CSS to Tailwind Converter, Pixel to REM Converter, Image Compressor, Image Resizer, Curl to Code Converter, HTML to JSX Converter, SVG Optimizer, Aspect Ratio Calculator, JSON to Go Struct
Regex Tester & Explainer, Markdown Previewer, Text Diff Checker, JSON Diff Checker, String Case Converter, Cron Expression Parser, Word & Character Counter, HTTP Status Code Reference
JWT Decoder & Debugger, Hash Generator, JWT Generator, Bcrypt Hash Generator & Verifier
CSS Box Shadow Generator, CSS Gradient Generator, CSS Grid Generator, CSS Flexbox Generator, HTML Table Generator, CSS Animation Generator, CSS Border Radius Generator, Tailwind Color Palette Generator
How It Works
codetools.run is built with Next.js and deployed as a fully static site. There is no backend server processing your data. When you use a tool, JavaScript running in your browser handles everything locally. Cryptographic operations use the Web Crypto API built into modern browsers. The site is served over HTTPS with strict security headers.