A lightweight spreadsheet right in your browser. Configurable rows × 30 columns, formula support, range selection, CSV/XLS export, and auto-saves locally — no account, no cloud, no fuss.
Default 20 rows × 30 columns (A–AD). Adjust row count (5–500) from the toolbar — the grid rebuilds instantly and your setting is saved.
Full formula engine: =SUM, =AVERAGE, =MIN, =MAX, =COUNT, and free-form arithmetic like =A1*B2+10. Cross-cell references supported.
Click and drag to select a range. Shift+click to extend. Shift+Arrow to grow or shrink. Ctrl+A selects the entire sheet.
Press Delete or Backspace to clear any selected range. Or use the 🗑 Clear button in the toolbar. Status bar shows how many cells were cleared.
Made a mistake? Ctrl+Z steps back up to 50 changes — including bulk deletes and formula edits.
One-click export to CSV or Excel (SpreadsheetML XLS). Smart bounds — only the used area is exported, no trailing blank rows.
Type =SUM( and a hint bar appears. Click your start cell, drag to the end, and the range reference (e.g. A1:B5) is inserted automatically.
Arrow keys, Tab, Enter to navigate. Start typing to overwrite a cell. Ctrl+Z to undo, Ctrl+A to select all — no mouse required.
Single cell shows its value. Multi-cell selection shows Sum, Average, and Count of numeric values — just like a real spreadsheet.
Every edit saves instantly to your browser's localStorage. No servers, no accounts, no internet needed. Your data never leaves your machine.
| Formula | Description | Example |
|---|---|---|
| =SUM(range) | Sum of a range | =SUM(A1:A10) |
| =AVERAGE(range) | Average of a range | =AVERAGE(B1:B5) |
| =MIN(range) | Minimum value | =MIN(C1:C20) |
| =MAX(range) | Maximum value | =MAX(A1:D1) |
| =COUNT(range) | Count of numbers | =COUNT(A1:A20) |
| =A1+B1 | Cell arithmetic | =A1*B2-C3/2 |
| =A1*1.1 | Multiply by constant | =SUM(A1:A5)*0.9 |
=SUM(A3:A7)*1.2 and similar formulas (function + arithmetic) returned #ERR! — now evaluates correctly=SUM(A1:A5)+AVERAGE(B1:B5), =MAX(A1:A10)-MIN(A1:A10), etc.Search for the extension on the Chrome Web Store and click Add to Chrome.
Open chrome://extensions and toggle Developer mode on.
Unzip the file, click Load unpacked, and select the folder.