JSONFormatView is a free browser-based workspace for formatting, validating, repairing, comparing, and converting JSON. Paste or upload a document to inspect it without sending its contents to a server.
The workspace combines an editable source, line and column validation errors, tree and table views, local document history, conversion tools, and downloadable output. The guides below explain both how the tools behave and the JSON rules behind the results.
A complete workspace, not a one-click text box
Formatting is often only the first step in investigating a payload. After making the indentation readable, you can expand nested values in the tree, search keys and values, inspect row-shaped arrays as a table, copy a JSON path, or compare the document with another version.
Your active documents and preferences are saved in browser storage so a refresh does not discard your work. This storage belongs to the current browser profile and can be cleared through its settings.
What happens to the JSON you paste?
Parsing, repair, formatting, comparison, and conversion are implemented in client-side JavaScript. JSONFormatView does not send the document text to an application server. Uploaded files are read with the browser File API and downloads are created locally.
As with any web tool, avoid pasting secrets into a device or browser profile you do not trust. Browser extensions, shared computers, and locally installed software are outside this site’s control.
Choose the right operation
Use Format when the JSON is valid but hard to read; Validate when you need to locate a syntax problem; Repair for a reviewable fix to common punctuation mistakes; Compare to inspect path-level changes; and Convert when another system expects YAML, XML, or CSV.
Frequently asked questions
Is JSONFormatView free?
Yes. All currently listed JSON tools are free to use.
Does JSONFormatView upload my JSON?
No. Document processing runs locally in your browser.
Can I use it with sensitive data?
Local processing reduces exposure, but you should still follow your organization’s data-handling rules and use a trusted device and browser profile.