Question 1

How do I format JSON data?

Accepted Answer

Paste your JSON into the input area and it formats automatically with proper indentation. Choose 2-space, 4-space, or tab indentation. Errors are highlighted instantly.

Question 2

What does the JSON validator check?

Accepted Answer

The validator checks for syntax errors like missing commas, unclosed brackets, invalid characters, and incorrect nesting. Error locations are highlighted with descriptions.

Question 3

Can I minify JSON with this tool?

Accepted Answer

Yes. Click the Minify button to remove all whitespace and produce the most compact JSON output, perfect for reducing payload size in APIs and configs.

Question 4

Is there a file size limit?

Accepted Answer

Processing happens in your browser, so there is no upload limit. Very large JSON files (50MB+) may be slower depending on your device.

JSON Formatter & Validator Online — Free