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CSV to JSON

Turn CSV rows into clean JSON, with a preview before you download. Free to use, with no account and no server uploads.

Your workspace

Processed on this device
Tool inputs

UTF-8 text up to 2 MB and 10,000 rows. Values remain strings.

UTF-8 text only. Your input is kept in this tab, not saved on our server.
The first row supplies JSON keys. Values stay strings, including leading zeroes.

Your original file stays untouched. Always inspect the output before using it.

Before you start.

UTF-8 text up to 2 MB and 10,000 rows. Values remain strings. The tool performs only the operation shown above. Keep a backup of your source, especially when working with important documents or publishing assets.

Does this work on a phone?

Yes, in a modern mobile browser with file selection and download support. File size limits still apply. If your browser opens the result instead of saving it, use its share or save menu.

Where do my files go?

Into your browser’s memory for processing, then into your downloads when you choose to save. Reloading or leaving this page discards the workspace.

What if I get an error?

The message explains which input to correct. Try the sample to check your browser, then compare your file with the format and limits in the guide. You can report a problem through Contact without sending your private file.