CSV ↔ JSON Converter
Optional — you can also paste text directly into the field below.
Convert CSV files to JSON and back in seconds: upload a file or paste the text directly, then copy the result or download it as a file. Conversion runs entirely in your browser using the trusted PapaParse library — your data is never sent to any server.
How to use
- Pick the conversion direction from the buttons at the top: CSV to JSON or JSON to CSV.
- Upload a file from your device, or paste the text directly into the input field.
- Press Convert to see the result in the output field along with the row count.
- Copy the result with the copy button or download it as a ready file.
Frequently asked questions
What JSON shape is accepted for conversion to CSV?
The tool accepts an array of objects like [{"name":"Sara","age":28}] or a single object, whose keys become columns. Nested structures like arrays inside objects are not supported since they cannot be represented as a table.
Is my data uploaded to a server during conversion?
No. All processing happens locally in your browser with the open-source PapaParse library — your data never leaves your device.
How does the tool handle numbers in CSV?
When converting CSV to JSON, numeric values are automatically typed as real numbers, not strings — so age becomes 28, not "28" — making the output ready for programmatic use.
Are semicolons supported instead of commas?
Yes. PapaParse auto-detects the delimiter used in the file — comma, semicolon or tab — so there is no need to specify it manually.