01/10/2026
Got a spreadsheet that needs to become JSON? 📊➡️🧩
You export a CSV, and the API, the seed file or your test fixtures want JSON. Writing a script for a one-off job is a pain, and a quick split(",") breaks the moment a cell contains a comma.
We built a free CSV to JSON converter that runs in your browser:
✅ Paste your CSV, copy a clean JSON array
✅ Handles quoted commas, quotes and line breaks properly
✅ Optional type inference for numbers, booleans and empty cells
✅ Zip codes like 02115 keep their leading zero
✅ Semicolon files from Excel work too
✅ Nothing is uploaded, your data stays on your machine
Try it here: https://wapgee.com/tools/csv-json-converter
Step-by-step guide with real examples: https://wapgee.com/web-development/javascript/csv-to-json-api-test-fixtures-seed-file-319
Convert CSV to JSON in your browser for API tests, fixtures or seed files. Handles quoted commas, type inference and semicolon files, no script needed.