FreedomOffice Sheets

A lightweight, open-source spreadsheet for Windows, written in Rust. One portable ~13 MB executable — no installer, no runtime, no account needed.

It deliberately follows the familiar desktop-spreadsheet layout and keyboard habits (ribbon, formula bar, Alt key sequences, Ctrl/Shift/F-key shortcuts), so years of muscle memory keep working. It reads and writes .xlsx, so your existing workbooks open as they are.

Download

Grab FreedomSheets.exe from the latest release and run it. To open a file, use File → Open, Ctrl+O, or drag a workbook onto the exe.

Features

Interface

• Light and dark mode that follow the Windows app setting, like desktop Office
• Ribbon with Home, Insert, Page Layout, Formulas, Data, Review, View and Help tabs, plus contextual Table Design, PivotTable Analyze/Design, Chart Design and Sparkline tabs
• Dialog launchers on Font, Alignment and Number, an inline Cell Styles gallery, Ribbon Display Options (Ctrl+F1)
• File backstage (New, Open, Save As, Print, Export, Account, Recent files), Quick Access Toolbar
• Name box with defined-name list, formula bar that expands (Ctrl+Shift+U)
• Sheet tabs (add, rename, colour, hide, drag to reorder), status bar with Sum / Count / Average, Extend / Add / End modes and zoom
• Excel-style right-click menus (also Shift+F10 and the Menu key) and Alt KeyTips: Alt, H, O, I, Alt, H, B, A, Alt, W, F, F, Alt, N, V, T and many more

Microsoft 365

• Sign in with a Microsoft account; open and save files on OneDrive and SharePoint, including Shared with me and Sites
• Saving back detects when someone else saved first (Save a Copy / Overwrite), optional AutoSave
• Share: invite people (can edit / can view), copy a link, manage access
• Needs your own app registration (client ID) in Microsoft Entra; File → Account shows the steps. Live co-authoring is not supported.

Formulas

• 433 functions: math, statistics and distributions, text and REGEX, date/time, logical, lookup (VLOOKUP, LOOKUP, INDEX/MATCH, XLOOKUP), database (DSUM…), financial, engineering, LET
• LAMBDA with named and recursive lambdas, MAP, REDUCE, SCAN, BYROW, BYCOL, MAKEARRAY, GROUPBY, PIVOTBY
• Dynamic arrays that spill (FILTER, SORT, UNIQUE, SEQUENCE, TEXTSPLIT, VSTACK, … and the A1# spill reference)
• 3-D references (Jan:Dec!B2), union and intersection operators, structured table references (Table1[Col], [@Col])
• Fast incremental recalculation (125k formulas recalculate in ~0.2 s; single edits in under a millisecond)
• Point-and-click references with colour-coded highlights, function autocomplete, argument hints, F4 to toggle $
• Named ranges with workbook or sheet scope, circular-reference detection, GETPIVOTDATA

Editing and formatting

• Fonts, rich text within a cell, fills, borders, alignment, text rotation, wrap text, merge & center, indent
• Number formats (General, Number, Currency, Accounting, Date, Time, Percentage, Scientific, Text, custom codes)
• Cell styles, Excel Tables (total row, banding, auto-expand), Format Painter (double-click to keep it on)
• Conditional formatting: highlight rules, top/bottom, above/below average, duplicates, formulas, data bars, colour scales, icon sets
• Data validation with in-cell dropdown lists, input messages and error alerts
• Fill handle like Excel (Ctrl toggles copy/series, Auto Fill Options, drag back to clear), Flash Fill (Ctrl+E)
• Paste Special (all paste types, operations, skip blanks, transpose, paste link) and the Paste Options button
• Pictures (move, resize), sparklines, cell notes with authors, hyperlinks
• Sheet protection with Excel's permissions and passwords
• Undo / redo (also inside the cell editor), AutoRecover (unsaved work is offered again after an unexpected exit)

Data

• PivotTables: field list with drag and drop, compact/outline/tabular layouts, grouping, Show Values As, styles, drill-down, refresh
• Sort with colour and custom lists; AutoFilter with text, number, date, colour and Top 10 filters
• Text to Columns wizard, Remove Duplicates, Subtotal, Flash Fill
• What-If Analysis: Goal Seek, Data Tables, Scenario Manager; Solver (linear, integer and nonlinear)
• Group / ungroup rows and columns with outline buttons, freeze panes, hide/unhide rows, columns and sheets
• Find & Replace with options and Find All, Go To, select precedents / dependents (Ctrl+[ / Ctrl+])

Charts

• Column, bar, line and area (clustered, stacked, 100%), pie, doughnut, scatter, radar and combo charts that update live
• Axis titles and scaling, secondary axis, gridlines, data labels, data table, trendlines, error bars
• Chart Elements (+) button, Format pane, Quick Layout, colour palettes, Select Data, Change Chart Type, Move Chart

Printing

• File → Print (Ctrl+P) with printer choice, Printer Properties, copies, pages, one/two-sided, collation, orientation, paper size, margins and scaling, plus a live page preview
• Prints directly to any installed Windows printer with the real fonts; File → Export creates a PDF
• Page Setup dialog (page, margins, header/footer, sheet tabs), print area, rows/columns to repeat on every page, manual page breaks, gridlines and headings, fit to N pages wide/tall, page-break lines in the grid
• Page setup is saved in the .xlsx

Files

Format	Open	Save
Excel workbook .xlsx / .xlsm	✓ (values, formulas, styles, rich text, merges, tables, PivotTables, charts, pictures, sparklines, conditional formats, validation, filters, protection, notes, links, groups, scenarios)	✓ (macros are not kept)
Excel 97-2003 .xls, binary .xlsb	✓ (values and formulas)
OpenDocument .ods	✓ (values and formulas)
CSV / TSV / text	✓ (delimiter and encoding detection)	✓
PDF		✓ (File → Export)

Keyboard shortcuts (selection)

Keys	Action
F2 · Esc · Alt+Enter	Edit cell · cancel · new line in cell
Ctrl+Arrow · Ctrl+Shift+Arrow	Jump / extend to the edge of the data
Ctrl+1	Format Cells
Ctrl+B / I / U / 5	Bold / italic / underline / strikethrough
Ctrl+Shift+$ % # @ !	Currency / percent / date / time / number format
Alt+= · Shift+F3	AutoSum · Insert Function
Ctrl+D · Ctrl+R · Ctrl+Enter	Fill down · fill right · fill selection
Ctrl+; · Ctrl+Shift+;	Insert date · time
Ctrl+Space · Shift+Space · Ctrl+A	Select column · row · region/all
Ctrl+- · Ctrl++	Delete / insert cells
Ctrl+Shift+L · Ctrl+T	Toggle filter · format as table
Alt+Shift+→ / ←	Group / ungroup
Ctrl+K · Shift+F2	Hyperlink · note
Ctrl+PgUp / PgDn · Shift+F11	Previous / next sheet · new sheet
Ctrl+F / H / G	Find / replace / go to
Ctrl+S · F12 · Ctrl+P	Save · save as · print

The full list is under Help → Keyboard Shortcuts.

Building from source

Requires Rust 1.88+ and the MSVC toolchain on Windows.

cargo build --release

The executable is written to target/release/FreedomSheets.exe (statically linked C runtime, icon and DPI-aware manifest embedded). Run the tests with cargo test.

Project layout

sheets/src/
  model.rs        workbook, sheets, cells, styles
  numfmt.rs       number format codes, dates, input parsing
  formula/        parser, evaluator, dependency graph, function library
  io/             xlsx reader/writer, xls/xlsb/ods (calamine), csv
  table.rs, filter.rs, pivot/, whatif.rs, solver.rs, sparkline.rs, iconset.rs
  chart.rs, condfmt.rs, validation.rs, page.rs, print/
  cloud/          Microsoft sign-in and Microsoft Graph (OneDrive / SharePoint / sharing)
  app/            UI (egui): grid, ribbon, dialogs, keyboard, KeyTips, charts, panes

Not yet supported

Macros/VBA, live co-authoring, slicers and timelines, shapes and SmartArt, Power Query, threaded comment replies (read as notes), waterfall/treemap/map charts, Forecast Sheet, localized function names and right-to-left sheets.

License

MIT. This is an independent, clean-room project. It is not affiliated with or endorsed by Microsoft; Microsoft Excel is a trademark of Microsoft Corporation and is mentioned only to describe file compatibility.