Can this tool validate JSON?

Yes, it shows errors with the exact line and character position.

Is there a size limit for JSON input?

No hard limit, but very large JSON (10MB+) may be slow to process.

Yes, use the Tree View tab to explore nested JSON structure.

Only standard JSON (RFC 8259) is supported currently.

Yes, the Minify function removes all whitespace from JSON.

validator

Format, validate, and minify JSON data online. Syntax highlighting, error detection, and tree view.

Input JSON

Output

Paste your JSON string into the editor.

Click Beautify for readable JSON, or Minify to compact it.

Copy the result to clipboard or download as a .json file.

Encode and decode Base64 strings online. Also supports file to Base64 encoding for data URIs.