CSV to JSON Converter
Convert between CSV and JSON with file upload and download.
How to use
- Upload a file or paste CSV or JSON text.
- Choose the conversion direction.
- Adjust options such as delimiter and header row.
- Download or copy the converted output.
About this tool
CSV to JSON Converter moves tabular and structured data between two of the most common exchange formats. Import a spreadsheet, transform it into JSON for an API, or flatten a JSON response so it can open directly in Excel or Google Sheets.
Features
Bidirectional conversion, file upload and drag-and-drop, configurable delimiters and header options, quoted field handling, nested key flattening, and downloadable output. A preview table helps you verify the parse before you commit.
Use cases
Importing CSV exports into applications that expect JSON, preparing mock API responses from spreadsheets, backing up JSON collections in a spreadsheet-friendly format, and cleaning up data received from third-party vendors.
Why choose this tool
All processing happens in the browser, keeping sensitive customer or analytics data on your device. The flexible options cope with the many real-world CSV quirks that break naive parsers, saving time on data integration tasks.
FAQ
- Which delimiters are supported?
- Comma, tab, semicolon, and pipe are available, and the tool can auto-detect the most likely delimiter.
- Does it handle quoted fields?
- Yes. Fields wrapped in quotes with embedded commas, newlines, or escaped quotes are parsed correctly.
- Can JSON be nested?
- Flat JSON converts cleanly to CSV. For deeply nested structures, the tool flattens keys with dot notation to keep spreadsheets readable.