I built a free developer tools site that works entirely in your browser

I built CodeToolkit — 14 free dev tools, no login, no BS

Every developer has been there.

You need to quickly decode a JWT token or format some JSON. You Google it, click the first result, and boom — "Sign up to continue." Or worse, "Watch this ad to see your result."

I got tired of it. So I built my own.

**What is CodeToolkit

**?

CodeToolkit is a collection of 14 free developer tools that run entirely in your browser. No login. No tracking. No server. You paste your input, you get your output. That's it.

Link: https://codetoolkit-lime-two.vercel.app

Tools included

Encoding

• Base64 Encoder/Decoder
• URL Encoder/Decoder
• HTML Entity Encoder

JSON

• JSON Formatter
• JSON Minifier
• JSON Validator

CSS

• CSS Minifier
• CSS Beautifier

Converters

• Color Converter (HEX, RGB, HSL)
• Unix Timestamp Converter
• Markdown to HTML

Generators

• UUID Generator
• JWT Decoder
• Regex Tester

Tech stack

• Pure HTML, CSS, Vanilla JavaScript
• Zero frameworks, zero dependencies
• Hosted on Vercel
• Two external libraries only — marked.js for Markdown, js-beautify for CSS

Why no framework?

Simple — faster load time, works offline, zero build step. A dev tools site should be fast. Nobody wants to wait for React to hydrate just to encode a Base64 string.

What's next?

Planning to add more tools every week. Some ideas:

• Hash Generator (MD5, SHA1, SHA256)
• Diff Checker
• CSV to JSON converter
• HTML Formatter

What tools do YOU wish existed? Drop them in the comments — I'll build them.

---

If this helped you or you find yourself using it, share it with a dev friend who's tired of sign-up walls too.