Free All-in-One JSON Toolkit — format, validate, convert & mock APIs in seconds
https://formatjsononline.com
Hey nerds, built a tiny but mighty browser tool for anyone drowning in messy JSONs.
“Spy Mission: Data Extraction”
– Convert scraped JSON into Excel before the boss asks, “Can I get that in a sheet?”
It’s called Format JSON Online, and it does the boring stuff for you — fast, clean, and without stealing your data.
What It Does
Beautify / Format JSON instantly- Validate and scream when you’ve missed a comma
- Minify for production
- Convert JSON ↔ CSV / Excel / XML
- AI JSON Generator — type “make me a user list,” and boom
- Mock API Publisher — turn your JSON into a live REST endpoint
- Bonus Tools: SQL formatter, JSON compare, schema validator, JSON path finder
Runs fully client-side — your data never leaves your browser
Why I Built It
I got tired of juggling random tools just to format one damn payload.
Now it’s all in one tab — no signup, no nonsense, just click and fix.
Help Me Improve It
- What features would make this a daily go-to for you?
- Got huge JSONs that crash other sites? Send me your worst.
- Any AI prompt ideas for generating complex test data?
Try it here: https://formatjsononline.com
Free, fast, and slightly addictive.
!