CSV to JSON Converter
Turn CSV spreadsheet data into JSON, free in your browser. Paste your CSV, preview the JSON, and copy or download it — no signup, no upload.
First row = column names. Numbers are converted to real JSON numbers automatically.
Your result will appear here
Converted JSON
Related searches: convert csv to json online, csv to json file free, spreadsheet to json converter, csv json converter no signup, excel csv to json.
How to use
- Paste your CSV data — the first row should be the column names.
- Click Convert to JSON and check the preview.
- Copy the JSON or download it as a .json file.
Frequently asked questions
What CSV format does it accept?
Standard CSV: comma-separated, with the first row as headers. Quoted fields containing commas, quotes or line breaks are handled correctly.
Are numbers kept as numbers?
Yes — a cell like 28 becomes the JSON number 28, and true/false become booleans. Empty cells become null.
Is my data uploaded anywhere?
No. Conversion runs entirely in your browser — your data never leaves your device.
What if rows have different numbers of columns?
Missing cells become null and extra cells are ignored, so conversion still succeeds — but tidy CSV gives the cleanest JSON.