CSV ↔ JSON
Turn CSV into JSON array or back.
About this tool
Convert CSV data to JSON and back without a spreadsheet. A fast bridge between exported tables and code that expects structured data.
Why use it
- Two-way conversion between rows and objects.
- Turns a CSV export into JSON your app can consume.
- Runs locally, so private data stays on your machine.
Common use cases
- Import a spreadsheet export into a JavaScript project.
- Flatten an API's JSON into a CSV for analysis.
- Reshape contact lists between formats.
Tips
- Make sure the first CSV row holds the column headers.
- Watch for commas inside values — they should be quoted.
How to use
- Paste CSV or JSON.
- Convert.
FAQ
- Can I convert both CSV to JSON and back?
- Yes, switch direction to turn CSV into JSON objects or flatten JSON into CSV rows.
- Is my data uploaded?
- No. The conversion runs in your browser, so spreadsheets stay on your device.
- Does the first row become the keys?
- Yes, the header row is used as field names for each JSON object.
- What about commas inside values?
- Quoted fields are respected so commas within a value do not split the column.
- Can it handle large files?
- Yes, thousands of rows convert quickly; very large files depend on device memory.
- Which delimiter is used?
- Comma by default, the standard CSV separator.