Nothing you open here is ever uploaded

Format and check JSON

Paste an API response and get it laid out readably — or a plain message telling you where it went wrong. Most formatters upload what you paste; this one cannot, which matters when the response has a token in it.

This page loads no libraries at all — the work is done by the browser itself. Your file is read on your own machine and never sent anywhere — open your browser's network tab and watch while you use it.

Questions

What if my JSON is invalid?

You get the position and the reason, in plain words rather than a stack trace.

Is it safe to paste an API response?

Here, yes — it never leaves the page. That is not true of most online formatters.

Other text & code tools

Everything here is free and works the same way — in your browser.

Word counterWords, characters, sentences and reading time, as you type. Case converterUPPER, lower, Title, Sentence, snake, kebab and camel. JSON minifierStrip the whitespace and see exactly what you saved. Base64 encodeEncode text — accents and emoji survive the trip. Base64 decodeDecode it back to readable text, Unicode intact. URL encoderPercent encoding, both directions.