CSV to JSON Converter — Spreadsheet to JSON Online
Free CSV to JSON converter. Turn CSV or spreadsheet data into a JSON array with header detection, custom delimiters and number conversion.
Runs in your browser — your data is never uploaded.
Paste CSV text and get clean JSON in return. The converter understands quoted fields, commas inside values, and different delimiters such as semicolons, tabs and pipes. You can use the first row as property names and convert numbers and booleans automatically, then copy or download the JSON.
How to use the CSV to JSON Converter
- Paste your CSV data.
- Choose the delimiter and header option.
- Copy or download the JSON.
CSV to JSON Converter — frequently asked questions
How do I convert an Excel sheet?
Save or export the sheet as CSV, open it in a text editor, and paste the contents here.
What if my file uses semicolons?
Change the delimiter to semicolon, tab or pipe.
Are numbers converted?
Yes, if you enable automatic type detection, numeric values become numbers instead of strings.
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