Header row
Input: name,role
Ada,Engineer
Output: [{"name":"Ada","role":"Engineer"}]
Developer
CSV to JSON Converter
Convert pasted CSV or TSV into JSON arrays locally with delimiter and header controls.
Runs locallyNo uploadNo external API
Input
Output
Paste CSV or TSV text to convert it to JSON.
Paste CSV or TSV text to convert it to JSON.
Runs in your browser. Input is not uploaded or sent to an external API.
Related tools
How to use CSV to JSON
Turn pasted spreadsheet rows into JSON arrays for fixtures, examples, seed data, and quick API payload experiments.
- Paste or type your input.
- Load the sample if you want a quick check.
- Run the action, review the result, then copy only what you need.
Examples
TSV
Input: name role
Grace Compiler
Output: [{"name":"Grace","role":"Compiler"}]
No headers
Input: Ada,Engineer
Output: [["Ada","Engineer"]]
Common use cases
Create JSON fixtures
Convert a small CSV sample, then format the JSON for a test fixture.
Round-trip data
Use JSON to CSV when you need to move a JSON array back into spreadsheet shape.
Compare converted payloads
Use JSON Diff after conversion to inspect changes.
Limitations
CSV dialects vary
Quoted commas and escaped quotes are supported, but unusual spreadsheet exports may still need cleanup.
Large files
This paste-based converter guards large input because all parsing stays in the browser tab.
FAQ
Can this convert TSV?
Yes. Choose tab delimiter or leave delimiter on auto for common TSV input.
What happens without headers?
Turn off header row to produce arrays instead of objects.
Does the CSV upload anywhere?
No. The parser runs locally in your browser.