CSV to JSON converter

Convert delimited tabular text into formatted JSON arrays or objects in your browser. Prepare a small CSV, TSV or custom-delimited extract for an API, script or data review without uploading it.

3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly

CSV to JSON converter workspace

Runs locally in your browser

Conversion runs locally. Quoted fields, line breaks and duplicate headings are handled; very large output is capped for browser safety.

Result

Data rows—

Columns—

JSON output

Use it with confidence

How to use the CSV to JSON converter.

Add the requested inputs

Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.

Calculate and review

Use the main action when needed. A quote-aware parser reads the selected delimiter; header mode maps each following row to normalised, unique keys, while no-header mode returns arrays.

Try a worked example

Treat the first row as headers to turn name,email rows into JSON objects with unique property names.

Check the assumptions

Delimiter choice and source encoding still matter, and automatic values remain strings rather than inferred numbers, dates or booleans.

Helpful answers