CSV to JSON Converter
Paste CSV data or load a CSV file, detect the delimiter, and convert rows into readable JSON objects using the header row as keys.
Runs locally in your browser. Your data never leaves your device.
CSV input
Or drop any file .csv, .tsv, .txt · up to 2.0 MB. Read in your browser, never uploaded.
Output
- Rows
- 2
- Columns
- 2
CSV converted to JSON.
How to convert CSV to JSON
Convert a CSV or TSV table into formatted JSON objects using the first row as field names.
How to use it
- Paste CSV data or load a .csv, .tsv, or .txt file.
- Let the tool detect the delimiter, or choose comma, semicolon, or tab.
- Review the row and column counts.
- Copy the formatted JSON output.
Expected CSV shape
The first row is treated as headers. Each following row becomes one JSON object, and missing cells become empty strings.
Before copying JSON
- Check that the detected delimiter matches your file.
- Confirm the header names are the keys you want.
- Review row and column counts for obvious paste mistakes.
Local conversion
CSV parsing and JSON formatting happen in your browser. Files are read locally and not uploaded.
CSV to JSON FAQ
- Does it support quoted commas?
- Yes. Quoted cells can contain delimiters and escaped quotes.
- Can I convert TSV?
- Yes. Choose Tab as the delimiter or let the detector pick it from the first row.
- Are numbers converted to JSON numbers?
- No. CSV cells are kept as strings so identifiers, leading zeros, and formatting are preserved.