Upload a CSV, get back a JSON array of objects. Everything runs in your browser — nothing is uploaded.
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Upload a CSV file
.csv
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Result
0 rows
Common questions
Does the first row of my CSV need to be a header row?
Yes — the first row is always used as the object keys in the resulting JSON. If your file does not have a header row, add one before converting.
How are commas inside a value handled?
Quoted fields are read correctly, so a value like "Smith, John" with a comma inside quotes stays as one field rather than being split apart.
Can I convert a very large CSV file?
Yes, though very large files (many hundreds of thousands of rows) will take longer and use more of your device’s memory, since everything happens in your browser rather than on a server.