As a developer, I kept running into the same problem:

Every time I needed to do something simple — format JSON, decode a JWT, generate a UUID — I had to either install a tool or search for one online.

Some required login. Some sent data to servers. Some were just slow.

So I started building small tools that run directly in the browser.

Over time, it turned into a collection of 100+ tools.

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🧠 Why Build Tools in the Browser?

Modern browsers are powerful enough to handle most developer utilities locally.

That means:

• No installation

• Instant performance

• Better privacy (no data leaves your machine)

For example, formatting JSON or converting HTML to Markdown doesn't actually require a backend at all.

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🔧 A Few Useful Ones I Built

Here are some tools I ended up using the most:

HTML to Markdown

Converts HTML into clean Markdown format. Useful when writing documentation or GitHub README files.

JSON Formatter

Helps debug API responses quickly by formatting and validating JSON.

Base64 Encoder / Decoder

Handy when dealing with encoded data in APIs.

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⚡ Example: HTML to Markdown

Instead of manually rewriting HTML:

<h1>Hello</h1>
<p>This is <strong>test</strong></p>

You get:

# Hello

This is **test**

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🔒 Privacy Matters

One thing I cared about was making sure everything runs client-side.

So none of these tools send your data anywhere — everything happens locally in your browser.

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💡 Final Thoughts

This started as a small side project to solve my own problems, but it turned out to be something I use daily.

If you're building tools like this, I'd recommend trying to push more logic into the browser — it's simpler than most people think.

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(if you're curious, I shared it here)