CSV to JSON

What this tool does

CSV to JSON: free online File tool with clear controls, private processing where supported and verifiable results.

Input and output

Convert to JSON: text you paste into the page → data.json (application/json)

How to use CSV to JSON

1. Provide text you paste into the page.
2. Fill in CSV.
3. Leave First row contains headers at its default "yes" or choose another value.
4. Press "Convert to JSON" and review the result in the panel on the right.
5. Download or copy data.json (application/json).

Settings

First row contains headers

Yes · No

Infer number, boolean and ISO date types

Yes · No

Empty value handling

Keep empty string · Use null · Omit property

Output structure

Array of records · Object with headers and rows

JSON format

Pretty · Minified

Privacy and limitations

• CSV to JSON runs entirely in your browser: the input is not uploaded, so it never leaves your device.
• Results depend on valid input and on the limits declared by each field above; this page does not promise a fixed processing time or file size.

Frequently asked questions

Is my data uploaded when I use CSV to JSON?

No. This tool runs entirely in your browser, so the input stays on your device and is not uploaded.

Which input does it accept?

It works with text you paste into the page.

What do I get back?

After you press "Convert to JSON" the result panel shows data.json (application/json), which you can copy or download.

Can I change the settings?

Yes. The page exposes First row contains headers (Yes, No); Infer number, boolean and ISO date types (Yes, No); Empty value handling (Keep empty string, Use null, Omit property); Output structure (Array of records, Object with headers and rows); JSON format (Pretty, Minified).