CSV → JSON
Convert CSV spreadsheets to JSON
No watermarkFree & unlimited
Mode
Input (CSV)
Output (JSON)
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Paste or upload CSV
Paste your CSV text into the input area or upload a .csv file from your device.
- 2
Configure parsing options
Set the delimiter (comma, semicolon, tab) and choose whether the first row contains headers.
- 3
Preview the output
Review the generated JSON array in the output panel to verify the structure is correct.
- 4
Copy or download
Copy the JSON to your clipboard or download it as a .json file.
- Ensure your CSV headers are clean - they become the JSON object keys directly.
- If your CSV uses semicolons (common in European locales), switch the delimiter setting before converting.
- Wrap fields containing commas or newlines in double quotes to avoid parsing errors.
- For large files, upload the file directly instead of pasting to avoid browser slowdowns.
- Auto-detects delimiters (comma, semicolon, tab)
- Supports header row mapping to JSON keys
- Handles quoted fields with embedded commas and newlines
- Pretty-prints output with configurable indentation
- Processes everything locally in your browser
- Convert exported spreadsheet data into JSON for use in web applications or APIs
- Prepare CSV datasets for import into NoSQL databases like MongoDB
- Transform CSV config files into JSON format for Node.js projects
- Convert CSV logs into structured JSON for analysis tools
Yes. The tool auto-detects commas, semicolons, and tabs, and you can manually override the delimiter if needed.
Empty cells are converted to empty strings in the JSON output. You can optionally convert them to null values.
Since processing happens in your browser, practical limits depend on your device memory. Files up to 50 MB typically work without issues.