CSV JSON Converter

Convert CSV to JSON and JSON arrays back to CSV with delimiter choices, header handling, type inference, and clear parsing errors.

CSV or JSON Converted data Runs in your browser

Tool guide

What this csv json converter does

Use this CSV JSON converter when spreadsheet exports need to become API fixtures, seed data, or developer test cases, or when JSON arrays need to be reviewed in a spreadsheet.

Common use cases

Convert CSV exports into JSON arrays for tests.
Turn JSON objects into CSV for spreadsheet review.
Handle quoted commas, escaped quotes, and alternate delimiters.
Infer numbers, booleans, and nulls when creating JSON fixtures.

Accepted input formats

CSV with headers

id,name
1,Ada

JSON array [{"id":1,"name":"Ada"}]

Delimiters Comma, semicolon, tab, or pipe

How it works

The CSV parser handles quoted fields and escaped quotes. CSV-to-JSON uses the first row as object keys when headers are enabled. JSON-to-CSV flattens object keys into columns.

Common mistakes

Disable header row mode when the first row is real data.
Choose the delimiter that matches the export before converting.
Review inferred types if leading zeroes or IDs must stay as strings.

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FAQ

Frequently asked questions

Can it convert JSON back to CSV?

Yes. Use JSON to CSV mode with an array of objects.

Does it support tabs or semicolons?

Yes. Choose the delimiter before converting.

Is my data uploaded?

No. Conversion happens in the browser.