I’ve lost count of how many times I’ve needed to format, escape, or validate JSON while working. It happens constantly. A quick API response check, debugging a config file, or cleaning up test data.

For years, I used whatever JSON tool popped up first on Google. Copy, paste, click a button, done. Easy, right?

But then it hit me. I was pasting client data, production configs, and sensitive strings into random websites I knew nothing about. Who runs these sites? What happens to my data after I paste it? Is it logged? Stored? Sold?

I had no idea. And that made me uncomfortable.

So I built my own: json.juashyam.com

Why Another JSON Tool?

Good question. There are hundreds of JSON tools out there. Some are great, some are terrible, most are somewhere in between.

But here’s the thing. None of them could guarantee my data wasn’t being sent somewhere. Even if they claimed to be “privacy-friendly,” I had no way to verify it.

I needed a tool I could trust. One where I knew exactly what was happening to my data. So I built one.

Everything Happens in Your Browser

The entire tool runs client-side. When you paste JSON into the input box, it stays on your machine. Nothing gets sent to a server. Nothing gets logged or stored. Nothing leaves your browser.

You can disconnect your internet, and it’ll still work perfectly.

This isn’t marketing speak. It’s just how the tool works. All the processing happens locally using JavaScript. No backend, no API calls, no database.

What It Does

The tool handles the basics you need for working with JSON:

Escape - Converts JSON into an escaped string for use in code or configs

Unescape - Turns escaped strings back into readable JSON

Prettify - Formats JSON with proper indentation for easy reading

Minify - Compresses JSON into a single line to save space

That’s it. No fancy features, no bloat. Just the core functions that actually matter when you’re working with JSON day to day.

When I Use It

I use this tool constantly. Here are some common scenarios:

API Testing - When I need to quickly validate or format a response

Config Files - Cleaning up messy configuration data

Database Values - Working with JSON columns in SQL queries

Code Generation - Escaping JSON for use in test fixtures

Debugging - Making ugly one-line JSON readable

It’s become my go-to whenever I touch JSON. Which, let’s be honest, is multiple times a day.

Why Privacy Matters

You might think “it’s just JSON, who cares?” And for toy examples, sure, it doesn’t matter.

But real-world JSON often contains sensitive stuff. API keys, user data, internal endpoints, business logic, authentication tokens. Things you definitely don’t want floating around the internet.

Even if a site promises not to log your data, you’re trusting them. And trust isn’t something I hand out freely when it comes to client data or production systems.

With a client-side tool, there’s no trust needed. The code runs in your browser. You can inspect it, verify it, and know for certain that nothing leaves your machine.

Try It Out

If you work with JSON regularly and care about privacy, give it a shot: json.juashyam.com

It’s free, fast, and your data stays yours.

No sign-ups, no tracking, no nonsense. Just a simple tool that does what it says.

Curious about the tech stack? Check out the project details to see how it’s built.

What made you start thinking twice about online tools? Share your story below.