LocalSheet

Everything you type is stored only in this browser's localStorage — there is no account, no server database, and nothing is ever uploaded. Use Backup to download your workbook as a file (and Restore to load it on another machine).

Shortcuts

Type / F2 / double-click	edit a cell
Enter · Tab · arrows	commit + move
Shift + arrows / click	extend selection
⌘C · ⌘X · ⌘V	copy / cut / paste (works with Excel & Sheets)
⌘Z · ⌘⇧Z	undo / redo
⌘B · ⌘I · ⌘U	bold / italic / underline
Delete	clear cells
Right-click	insert / delete rows & columns
Drag the fill square	fill down / across (continues numbers, "Item 1", months, weekdays, quarters)
Double-click the fill square	fill down to match the neighboring column
Σ	AutoSum the numbers above / left of the selection
⌘F	find in sheet (Enter = next, ⇧Enter = previous; ⇄ expands Replace)
Right-click	sort, insert/delete rows & columns, notes, data validation
Hover a column header	filter dropdown — check/uncheck values to hide rows

Formatting & data tools

Cond. format adds highlight rules ("> 50,000"), color scales and data bars. Freeze pins row 1 while you scroll. Data validation (right-click) gives cells a dropdown of allowed values. Notes (right-click) show on hover with an orange corner marker. Typed dates like 2024-03-15 become real dates — use DATE, YEAR, EOMONTH, DATEDIF etc.

Import reads CSV and Excel .xlsx files; Export writes CSV or a full .xlsx workbook (formulas included). The workbook dropdown in the top bar manages multiple independent workbooks — all stored in this browser.

While typing a formula you get function autocomplete (↑↓ + Tab to accept), colored highlights on every referenced range, and point mode — click or drag cells in the grid to insert their reference at the caret. Each sheet is 10,000 rows × 52 columns; the practical limit is your browser's ~5 MB localStorage quota.

Linking sheets & named ranges

Reference other sheets like Excel: =Growth!B2 or ='Sales Data'!F2:F25 (quote names with spaces). Renaming a sheet rewrites every formula that points at it.

Named ranges: select any range, type a name (e.g. Revenue) into the Name Box (left of the formula bar) and press Enter. Then use it anywhere: =SUM(Revenue). Typing an existing name in the Name Box jumps to it — try SalesRevenue in the sample workbook.

Visualizer

The Visualizer tab turns your sheets into dashboards — bar, line, area, pie, scatter, KPI, table and pivot visuals with aggregation, group-by, filters, sorting and Top N. Pivots can be materialized as a real sheet with one click. The first row of a sheet is used as column headers. Dashboards are saved in this browser too.

Formulas

Start with =. Cell refs (A1, $B$2), ranges (A1:C10), operators + - * / ^ & % = <> < > and these functions:

Conditional formatting ✕

Add a rule

Data validation ✕