How to use CSV to JSON
- Paste CSV or upload a small file if supported.
- Set delimiter to comma, semicolon, or tab for EU exports.
- Confirm header row handling matches your sheet.
- Copy JSON into your app or download the blob.
Worked examples
Concrete numbers and cases you can check against the tool above.
Survey import
Semicolon CSV from Excel EU export becomes JSON for a Chart.js bar chart mock.
When to use CSV to JSON
Front-end prototypes and serverless functions often need JSON imports. Conversion avoids manual Excel macros uploading data elsewhere.
Common use cases
- Load marketing lead lists into a mock API.
- Convert survey exports for D3 charts.
- Turn inventory CSV into Firebase seed documents.
- Inspect malformed rows before ETL pipelines.
Inputs and outputs
- CSV with configurable delimiter
- JSON array-of-objects output
Privacy
This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.
Frequently asked questions
- How are quotes escaped?
- RFC-style doubled quotes inside fields should parse; broken quoting shows row errors.
- Can JSON be nested?
- Flat CSV becomes flat objects; nest manually after conversion.
- Is there a row limit?
- Very large sheets may slow the browser; split files if needed.