Upload a CSV file or paste CSV data and convert it to JSON. All processing happens in your browser.
Need JSON → CSV instead?
Switchor drag and drop
CSV files up to 10MB
Preview
Upload a file or paste CSV data to see the preview
About this CSV to JSON tool
Convert CSV into structured JSON right in your browser. Choose comma, tab (TSV), or semicolon delimiters. Header row is detected, values are typed where possible, and quoted fields with commas or newlines are handled safely. It's fast, private, and offline-friendly.
- Supports comma, tab ( \t ), and semicolon delimiters.
- Skips empty lines; preserves multiline cells.
- No uploads—your data never leaves the device.
- Related tools: JSON to CSV · JSON Formatter
Usage Tips
- 1
Make sure your CSV data has a header row with column names
- 2
Select the correct delimiter used in your CSV file (comma, tab, or semicolon)
- 3
For large files, consider splitting them into smaller chunks for better performance
- 4
All processing happens in your browser - your data is never sent to our servers