Nifty Spreadsheet Viewer
Open Excel, OpenDocument and other spreadsheets in a fast read-only grid with sheet tabs, formulas, search and CSV export, and compare two workbooks as a diff.
Maintained. No sign-in. No telemetry. Works in VS Code, Cursor, Windsurf, VSCodium and other editors that use Open VSX.
Features
- Open spreadsheets in VS Code.
.xlsx, .xlsm, .xlsb, .xls, .ods, .fods and Apple .numbers files open in a fast, read-only grid instead of "binary file". Large sheets scroll smoothly because only the visible rows are loaded.
- Sheet tabs, formulas and comments. Switch sheets at the bottom. Select a cell to see its address and its formula (
=SUM(B2:C2)) or value in the bar above the grid. Formula cells and cells with comments are marked.
- Keyboard and search. Move with the arrow keys, Page Up/Down, Home/End and Ctrl+Home/End. Ctrl+C copies a cell. Find searches values and formulas across all sheets; press Enter to step through the matches.
- Export to CSV. Save any sheet as UTF-8 CSV, from the viewer, the editor's title bar or the Explorer's right-click menu.
- Open as text. See every cell and formula of a workbook as plain text, to search it or copy from it.
- Compare workbooks. Select two spreadsheets in the Explorer (or run the command) to see what changed, cell by cell, with formulas, in VS Code's diff editor.
- Stays up to date. If the file changes on disk (re-exported, pulled from git), the viewer reloads it.
- Works in the browser on vscode.dev and github.dev.
Commands
| Command |
What it does |
Nifty Spreadsheet Viewer: Open Spreadsheet |
Open a spreadsheet in the viewer |
Nifty Spreadsheet Viewer: Export Sheet as CSV |
Save a sheet as a CSV file |
Nifty Spreadsheet Viewer: Open Workbook as Text |
Show every cell and formula as text |
Nifty Spreadsheet Viewer: Compare Workbooks |
Diff two workbooks cell by cell |
Settings
| Setting |
Default |
What it does |
nifty.spreadsheet.maxSizeMB |
200 |
Largest spreadsheet to open (it is read into memory) |
Credits
Spreadsheets are read with SheetJS Community Edition, licensed under the Apache 2.0 License.
Install
- VS Code: search for "Nifty Spreadsheet Viewer" in the Extensions view, or install from the Visual Studio Marketplace.
- Cursor, Windsurf, VSCodium, Kiro, Antigravity: install from Open VSX.
Privacy
This extension collects no telemetry and needs no account.
- Nifty Data Viewer: CSV & Parquet Viewer with SQL: Open CSV, Parquet and JSON files as a fast table and query them with SQL, powered by DuckDB. Sort, page through millions of rows, and export to CSV, Parquet or JSON. (Open VSX)
- Nifty SQLite: SQLite Viewer & Query Editor: Browse and query SQLite databases: tables and views in the side bar, a fast grid for any table, SQL queries with results, and export to CSV or JSON, with no native modules. (Open VSX)
- Nifty Folder Compare: Diff Two Folders: Compare two folders: see which files were added, removed or changed in a tree, open side-by-side diffs, ignore whitespace or line endings, and copy files across. (Open VSX)
- Nifty JSON: Formatter, Validator & JSONPath: Format, minify, sort keys, query with JSONPath, copy paths, generate TypeScript types, and browse huge JSON files in a fast tree view. (Open VSX)
- Nifty Code Metrics: Complexity & Hotspots: Complexity and size for every function in any language, as CodeLens and warnings, plus a hotspots view of the complex files that change most often. (Open VSX)
- Nifty Git Graph: Git History & Branch Graph: See your git history as a graph: branches, merges and tags, commit details and diffs, and checkout, merge, rebase, cherry-pick and more from a right-click. No sign-in. (Open VSX)
See all 42 Nifty tools at https://getnifty.dev
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