Web Tools
CSV / JSON Converter
Convert between CSV and JSON formats with automatic delimiter detection, quoted field support, and custom options. Runs entirely in your browser — your data never leaves your machine.
csv json converter data spreadsheet import export developer-tools
Published May 28, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Paste CSV or JSON data, choose a direction, and click Convert. The tool handles quoted fields, escaped characters, custom delimiters, and header rows automatically.
Features
- Bidirectional: CSV → JSON and JSON → CSV
- Delimiter support: comma, semicolon, tab, and pipe — with auto-detection
- Header row toggle: parse with or without a header row
- Quoted field handling: respects RFC 4180 quoting (commas in fields, escaped quotes)
- Copy output: one-click copy of converted result
- Private: runs entirely in the browser — no data transmitted
Supported Formats
| Direction | Input | Output |
|---|---|---|
| CSV → JSON | Comma/semicolon/tab/pipe-delimited text | Array of objects (with header) or array of arrays |
| JSON → CSV | Array of objects | Delimited text with optional header row |
Use Cases
- Converting spreadsheet exports to JSON for API payloads
- Transforming API responses to CSV for spreadsheet import
- Cleaning and reformatting data between systems
- Quick data inspection without opening a spreadsheet app