JSON to CSV.
Paste a JSON array of objects. Get a clean CSV ready for Excel or Google Sheets.
JSON Input
CSV Output
Everything happens in your browser
Local processing
Conversions happen in your browser. Nothing is uploaded.
Instant results
Native browser APIs mean no server queue, no waiting room.
No account needed
Open, drop, convert. No sign-up, no email, no friction.
Frequently asked questions
What JSON shape works?
An array of flat objects. Nested objects are serialized as JSON strings inside their cells.
How are headers determined?
All unique keys across all objects become headers, in first-seen order. Missing values become empty cells.
Are commas and quotes escaped?
Yes. Any value containing commas, quotes, or newlines is wrapped in double quotes (RFC 4180 compliant).
Are my files really not uploaded?
Correct. Every conversion in this tool runs in your browser using JavaScript and the local file APIs. There is no server-side processing, no file upload, no temporary storage, and no log of what you converted. You can verify this by opening your browser's network tab while converting — the only traffic is loading the page itself.
Do I need an account or to install anything?
No. Open the page, drop your file, download the result. No signup, no email, no extension, no app.
Is there a file-size limit?
Not from us. The practical limit is your device's memory — browser tabs typically handle files in the hundreds of megabytes range without issues. Very large files may take longer to process on phones than on laptops.