I tested 10+ online JSON tools so you don't have to. Most suck.

I work with JSON every single day. So I tested every online JSON tool I could find. Most of them are garbage.

My verdicts, in 1-2 lines each:

  1. JSONLint — the old reliable. Validates, formats, that's it. No bloat. But that's also all it does.
  2. JS Diff — fine for comparing two JSON files. Nothing else. You'll still need another tab for everything else.
  3. Code Beautify — every tool ever made on one site, with 400 ads. The page takes longer to load than my workday.
  4. JSON Editor Online — tree editing is genuinely nice for huge files. But it's an editor, not a toolbox.

The pattern: everyone builds ONE tool and calls it a day. So I built a toolbox instead: jsonprocess.app.

Full disclosure: I built it, so it's first on my list. But here's why it's the one I actually use:

  • 20+ tools: format, validate, diff, convert to CSV/YAML, JWT decode, code generation
  • everything runs in your browser. Nothing gets uploaded anywhere
  • no ads, no accounts, no "upgrade to Pro" nagging
  • works offline as a PWA, can install it like an app

Try them all. Or just bookmark the one that doesn't annoy you.

jsonprocess.app →

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