Question 1

How do I format messy JSON?

Accepted Answer

Paste it into the box and click Format — it's pretty-printed with 2-space indentation instantly.

Question 2

How do I check if my JSON is valid?

Accepted Answer

Just paste it in. A green 'Valid JSON' message appears automatically, or a red error explaining exactly what's wrong.

Question 3

Can I minify JSON to make it smaller?

Accepted Answer

Yes — click Minify to strip all whitespace and get a single-line, compact version.

Question 4

Is my JSON uploaded anywhere?

Accepted Answer

No. Everything is parsed and formatted locally in your browser — nothing is sent to a server.

JSON Formatter