Spreadsheet Viewer and Editor
Open CSV and Excel files locally, edit tables, and recover autosaved browser data
Import Table Data
Recovery Cache
No cached workbook found.
Workbook Controls
Edit
Export
Spreadsheet Workspace
Open a file, paste a table, or restore a cached workbook.
No spreadsheet loaded
Use the import panel to open a local workbook or paste tabular data. The latest workspace will be autosaved to browser cache.
When to Use Spreadsheet Viewer and Editor
Order Export Review
Open mixed CSV exports with summary rows, blank separators, order details, payment columns, and transaction IDs.
Local File Recovery
Recover the last autosaved table from browser cache when the original local file was moved or deleted.
Excel Workbook Preview
Inspect multi-sheet XLSX, XLS, XLSM, XLSB, and ODS files without opening a desktop spreadsheet app.
Quick Cell Cleanup
Fix names, IDs, amounts, dates, or pasted text before exporting the cleaned sheet to CSV or XLSX.
Developer Data Checks
Paste generated CSV, TSV, or HTML table output and verify structure before using it in scripts or imports.
Private Data Review
Review sensitive local exports in the browser without sending the workbook to a conversion API.
Frequently Asked Questions
What is Spreadsheet Viewer and Editor?
Spreadsheet Viewer and Editor is a browser-based tool for opening CSV, TSV, TXT, XLSX, XLS, XLSM, XLSB, ODS, and HTML table files. It renders workbook sheets as editable tables and stores a recovery copy in browser local storage.
Can this tool open CSV files with summary rows before the main table?
Yes. The tool displays rows exactly as a spreadsheet grid, so files with summary sections, blank lines, and a detailed table below can still be reviewed and edited without needing a perfect header row.
Is my spreadsheet uploaded to a server?
No. Files are parsed in your browser with client-side JavaScript. The recovery cache is saved in your own browser storage for the current site origin and can be cleared at any time.
Can I edit spreadsheet cells?
Yes. Click any cell in the grid and type directly. You can also insert rows, insert columns, delete selected rows or columns, clear the active sheet, and create a new sheet.
How does browser cache recovery work?
After a file is opened or a cell is edited, the current workbook is saved to local browser storage. If the original local file is deleted, you can reopen the page and restore the last saved table from cache.
What formats can I export?
You can export the whole workbook as XLSX, export the active sheet as CSV, download all sheets as JSON, or copy the active sheet as tab-separated text for spreadsheets and documents.
Are there file size limits?
The tool depends on browser memory and local storage limits. Small and medium spreadsheets work best. Very large workbooks may parse slowly or exceed the available browser cache quota.
Is this spreadsheet viewer free?
Yes. The tool runs in the browser, requires no account, and does not require a paid API key.
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