Skip to content
QuicklyTools

CSV to JSON Converter

Convert CSV or TSV to JSON with header detection, automatic number/boolean typing and delimiter auto-detection.

Runs in your browser
Loading tool…

About the CSV to JSON Converter

Convert spreadsheet exports into JSON ready for APIs, fixtures or JavaScript. The parser (Papa Parse) handles quoted fields, embedded commas and line breaks, and detects whether the file uses commas, semicolons, tabs or pipes.

Your data is processed in the browser and never sent to a server, so it is safe to paste payloads that contain tokens or personal data.

How to use it

  1. Paste CSV or open a .csv/.tsv file.
  2. Set header and type-conversion options.
  3. Copy or download the JSON.

Good to know

  • With type conversion on, values like 007 become the number 7. Turn it off to keep leading zeros (ZIP codes, IDs).
  • Empty lines are skipped.

Frequently asked questions

What if my CSV has no header row?

Untick “First row is header” to get an array of arrays.

Does it support Excel files?

Save the sheet as CSV first; .xlsx is not read directly.

More developer tools →