FAQ

Where does my data go?

Nowhere. csv2app runs entirely in your browser. Your CSV file is parsed locally, held in memory, and never uploaded to any server. There are no logins, sessions, cookies, or analytics tracking your data.

How do I save my edits?

Click the big Download CSV button in the top-right of the page. Your edited file will save to your computer's downloads folder. Downloading is the only way to save your data.

What happens if I close the tab without downloading?

You'll get a browser warning if you have unsaved changes. If you confirm and close anyway, treat your data as gone. csv2app does make a best-effort local recovery snapshot for crashes and accidental closes, but it isn't reliable enough to depend on — it's limited to this browser on this machine, may be wiped by clearing browser data, and won't fit larger files. Always download to keep your work.

How does csv2app figure out column types?

When you import a file, every column's values are inspected and classified as one of: integer, number, boolean (true/false/yes/no), date (ISO YYYY-MM-DD or common M/D/YYYY), or string. The type controls sorting behavior and which input is shown in the form view.

Can I add or remove columns?

Yes. In the grid view, click + Add column at the bottom and choose a name and type. To remove a column, click the × next to its header.

How does sorting work?

Click any column header in the grid to sort. Click again to reverse direction. Sorting respects the inferred column type — numbers sort numerically, dates sort chronologically, and empty cells always sink to the bottom.

How does search work?

Pick a column from the dropdown (or "All columns") and type a search term. The grid filters to matching rows, and the form view will only navigate through matches. Clear the box to see all rows again.

What file sizes work?

Anything that fits comfortably in your browser's memory. Files up to a few megabytes are smooth on most machines. Very large files (tens of MB+) may slow down editing because the grid renders all rows.

What about Excel files (.xlsx)?

Not supported. Export to CSV from Excel first (File → Save As → CSV).

Does it work offline?

Yes — once the page has loaded once, it runs without a network connection. (The CSV parser is loaded from a CDN on the first visit.)

Is this open source?

No, it isn't open source. But since it's a static site that runs entirely in your browser, you can view the source code at any time from your browser's developer tools (right-click → View Page Source, or press Ctrl+U).