CSV Editor Online

This tool opens a CSV in an editable grid so you can fix a value, rename a header, or add and remove rows and columns without wrestling with quoting in a text editor.

When you are done, the grid exports back to correctly quoted CSV that re-imports cleanly into any spreadsheet.

Click any cell to edit it, use the toolbar to add a row or column, and the row and column controls to delete. Paste an existing CSV to load it into the grid.

Export follows RFC 4180: values that contain a comma, quote or line break are wrapped and escaped automatically, so the file is never corrupted by the edit.

Every conversion happens locally in your browser, so your data is never uploaded, logged or stored on a server. You can use it on confidential exports without a second thought, and it keeps working offline once the page has loaded.

There is no sign-up, no watermark and no row limit: the only ceiling is your device's memory.