CSV to JSON Converter
Getting a spreadsheet into an application usually means turning rows into JSON objects. Doing it by hand is tedious and error-prone once quoting, commas inside fields and inconsistent types get involved.
Runs in your browser — the file is never uploaded
Drop any file to begin
Images · Documents · Data · Audio · Video — processed locally in your browser
How to convert CSV to JSON
- 1Drop the CSV onto the converter.
- 2Choose JSON as the output.
- 3Convert — the first row becomes the object keys and every subsequent row becomes an object.
Things worth knowing
- Make sure the first row really is a header row, otherwise your keys will be data values.
- Choose NDJSON instead if you are feeding a streaming or log-processing pipeline.
CSV to JSON — frequently asked questions
Are numbers converted to real numbers?
Yes. Numeric and boolean-looking values are typed rather than left as strings, so the JSON is immediately usable in code.
What about commas inside a field?
Quoted fields are parsed correctly, including embedded commas, quotes and line breaks.
Are my files uploaded to a server?
No. AllConverter runs the whole conversion inside your browser tab using WebAssembly and the Canvas API. Your file never travels over the network, which you can confirm by watching your browser's Network tab while you convert.