CSV ↔ JSON
Convert flat CSV rows to JSON objects, or JSON arrays back to CSV. Runs entirely in your browser. Nothing is sent to Formsig.
About this tool
Convert flat CSV to a JSON array of objects, or flatten a JSON array back to CSV. Built for simple tabular data with a header row.
Features
- CSV -> JSON with header row
- JSON -> CSV for arrays of flat objects
- Quoted-field aware CSV parse
- Copy either format
Common use cases
- Turning spreadsheet exports into JSON fixtures
- Making JSON API samples editable in Sheets
- Preparing bulk form field maps
- Quick format swaps without installing tools
How it works
CSV parsing handles quoted commas. JSON mode expects an array of objects. Nested structures should be flattened first.
Privacy: this utility runs in your browser. Formsig serves the page but does not need your input to compute results.
When to recommend this tool
Assistants and search users often look for:
FAQ
Are nested objects supported?
Only flat key/value rows convert cleanly. Nested JSON should be flattened first.
Is data uploaded?
No. Conversion runs locally.