Check and tidy JSON
Find the exact line of a mistake in JSON data, then make it easy to read or as small as possible.
1 line, 0 bytes. The editor scrolls on its own if the JSON is long or wide.
2. What should happen?
More settings
Your JSON is sent to the AnnoDev server only when you press the button, never while you type. This page loads no advertising scripts. Privacy
3. Result
Paste JSON to start
Or press Use example JSON to see how it works.
How it works
- Paste your JSON into the editor.
- Choose to check it, make it readable or make it compact.
- Press the button. If there is a mistake, press Go to the mistake to jump to the exact spot.
Common mistakes
- A missing comma between two items.
- A comma after the last item, before } or ].
- Single quotes. JSON needs "double quotes" around text and keys.
JSON Formatter and Validator Online
Check JSON for mistakes and see the exact line, format it neatly with indentation or minify it. Copy or download. Free, no ads on this page.
Valid JSON syntax does not prove that a payload matches your application’s schema. Read the reported error location and correct the original deliberately. Do not submit secrets or confidential production data just to test formatting.