CSV to JSON Converter
Turn spreadsheets into clean, typed JSON — instantly and privately.
- No uploads
- Live conversion
- Table preview
- Free, no sign-up
Drop a CSV or TSV file
or browse — or paste into the input below
Processed on your device — never uploaded
CSV input
Tip: press Ctrl/⌘+Enter to run immediately.
JSON output
Table preview
Convert CSV to JSON in your browser
Lindajzmin converts comma-, semicolon-, tab- or pipe-separated files into clean JSON instantly. It follows the CSV standard (RFC 4180), so quoted fields, embedded commas, escaped quotes and multi-line cells all come through correctly.
Choose an array of objects for APIs and JavaScript, arrays for compact tabular data, or JSON Lines for log pipelines and big-data tools. Type detection turns numbers and booleans into real JSON values while keeping things like zip codes with leading zeros as text.
How to use it
- Drop a file or paste CSV into the input.
- Adjust delimiter, header and output shape.
- Copy the JSON or download it as a file.
Features
- Automatic delimiter detection
- Handles quotes, line breaks in cells and UTF-8 BOM
- Unique keys for blank or duplicate headers
- Number, boolean and null detection
- Live table preview of the parsed rows
- Copy to clipboard or download .json / .jsonl