Open a CSV — even a 100 MB one — double-click a cell, type, undo, add rows and columns, then save as CSV or Excel. Everything runs locally: your file never leaves your machine.
No installs, no spreadsheet app, no upload-and-wait. The editor parses your file in a background thread and renders a windowed grid, so even very large CSVs open fast and stay smooth.
CSV, TSV or Excel. Big files parse off the main thread with a progress bar — a million rows is fine.
Double-click a cell (or just start typing) to edit. Enter commits, Esc cancels, Ctrl+Z undoes. Add or delete rows and columns from the toolbar; double-click a header to rename it.
Save the edited file as CSV or Excel, copy it, or open it straight in the dashboard builder.
Most online CSV editors choke past a few thousand rows. This one is built on the same virtualized engine as our big-file viewer.
Only the visible rows are rendered, so a 100 MB file scrolls like a small one. Parsing happens in a worker with live progress.
Arrow keys, Tab, Shift+select, copy as TSV, type-to-edit, sort by any column, filter-as-you-type.
Cell edits, row and column changes, renames — one undo stack, Ctrl+Z all the way back.
The file is parsed in your browser and never uploaded. Check DevTools → Network: zero requests with your data.