Does JSON Validator upload my file?

No. Selected and pasted contents are parsed in your browser.

Can I edit and validate the document?

Yes. Edit locally, validate the result, then download a new file.

BROWSER-LOCAL JSON TOOL

Find and fix invalid JSON.

Open or paste JSON, inspect its structure, edit, format or minify it, and export object arrays to CSV. Your contents stay in this browser.

No uploadUp to 50 MBNo signup

Choose a JSON fileor drop it here · maximum 50 MB

or paste JSON

Inspect nested structure

Searchable tree and raw editor views make nested objects, arrays, keys, values, and record boundaries easier to inspect.

Edit, format and validate

Validation reports the nearby line and column when the JavaScript parser provides a source offset. Syntax problems are reported without sending the document to a server.

Choose the matching format

Use JSON for one complete value, JSONL or NDJSON for one JSON value per line.