I built a privacy-first JSON formatter that works entirely in your browser

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Hey everyone! 👋

I'm building Instant JSON, a free, privacy-first JSON toolkit for developers.

It lets you format, validate, minify, repair, sort, and compare JSON directly in your browser. The goal is to make working with JSON fast and convenient without uploading your data to a server.

🛠️ What it offers:

  • JSON formatting and validation

  • Intelligent syntax repair

  • Minification and key sorting

  • Side-by-side JSON diff preview

  • Keyboard shortcuts for a faster workflow

🔒 Your JSON stays in your browser, with no server uploads.

Try it here:

I'm still improving the tool, so I'd really appreciate honest feedback from fellow developers.

What's one feature you'd want in your everyday JSON workflow that most online formatters are missing?

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