Online Spreadsheet Editor
Edit CSV and Excel files directly in your browser. High-speed, secure, and completely free. No software installation needed.
Spreadsheet Editor
Edit Excel and CSV files directly in your browser
What is Online Spreadsheet Editor?
Edit CSV and Excel files online without Microsoft Office. Import, edit, sort, filter data, and export back to XLSX or CSV. Handles up to 10,000 rows with auto-save to browser storage. Free with no registration.
Perfect for:
- Quick data cleaning and validation
- Price list and inventory updates
- Contact database management
- CSV editing for data imports
- Survey results processing
- Sales data organization
- Product catalog maintenance
- Simple financial record keeping
✨ Key Features
- ✓Native Excel support: Import and export .xlsx files with multiple sheets
- ✓CSV compatibility: Full support for comma-separated values
- ✓High-performance grid: Smooth editing with up to 10,000 rows
- ✓In-cell editing: Click any cell to modify values directly
- ✓Column operations: Sort, filter, hide, resize columns
- ✓Row operations: Insert, delete, reorder rows
- ✓Auto-save protection: LocalStorage saves your progress automatically
- ✓Export options: Download as XLSX, CSV, or JSON
Why Choose Our Free Online Spreadsheet Editor?
100% Free Forever
No hidden fees, no premium tiers, no credit card required. Completely free.
Privacy First
Your data never leaves your browser. We don't track or store anything.
No Sign-up Required
Start using immediately. No registration, no email, no verification.
Free alternative to: Microsoft Excel, Google Sheets, LibreOffice Calc, Zoho Sheet, OnlyOffice
How to Use Online Spreadsheet Editor Online
Get started in seconds with our simple 5-step process
Step 1
Choose a CSV or Excel file from your computer using the file uploader.
Step 2
Wait for the data grid to populate with your spreadsheet content.
Step 3
Click on any cell to start editing values directly in the grid.
Step 4
Use column headers to sort or filter data to find specific entries.
Step 5
Click 'Export' to download your updated file in XLSX or CSV format.
Online Spreadsheet Editor FAQ
Everything you need to know about our online spreadsheet editor
Will my formatting be preserved?
▼
Our editor focuses on data values. While we preserve structure and content, complex formatting like cell colors, fonts, borders, and macros may not be maintained during the round-trip. Use this tool for data editing, not formatting.
Is there a row limit?
▼
For best browser performance, we recommend files with fewer than 10,000 rows. Larger files may cause the browser to become unresponsive. Consider splitting very large datasets into smaller files.
Are my files private?
▼
Yes. Unlike many 'online' editors that upload to servers, our tool processes spreadsheet data directly in your browser using JavaScript. Your files are never uploaded to a remote server, providing complete privacy.
Does it support formulas?
▼
Currently, our editor is strictly for data entry and manipulation. It displays formula results as static values but doesn't support real-time Excel formulas (=SUM, =VLOOKUP, etc.) at this time.
Can I edit multiple sheets?
▼
Yes, XLSX files with multiple sheets are supported. You can view and edit each sheet individually. The export preserves the multi-sheet structure of your original file.
What happens if I close the browser?
▼
Your data is auto-saved to browser LocalStorage. When you reopen the editor, your last work is restored. However, clear browser data removes this storage—export important files regularly.
Can I collaborate with others?
▼
No, this is a single-user editor. For real-time collaboration, use Google Sheets or Microsoft Excel Online. Export from this tool and import to collaborative platforms when needed.
Does it work offline?
▼
After the initial page load, the editor works offline. Your changes are saved to LocalStorage. You can edit without internet, but need connectivity to initially load the page or export files.
Understanding Online Spreadsheet Editor: A Complete Guide
Spreadsheets are essential for data management, but editing them often requires Microsoft Excel or Google Sheets—both requiring accounts and internet connectivity. Our Online Spreadsheet Editor provides a lightweight, privacy-focused alternative that runs entirely in your browser.
The tool supports both CSV (plain text, universal compatibility) and XLSX (Excel format with multiple sheets) files. You can import data, perform full editing operations including in-cell editing, column/row manipulation, sorting by any column, and filtering to find specific records. All changes are auto-saved to your browser's LocalStorage, protecting your work from accidental refresh or browser crashes.
Unlike cloud-based spreadsheet tools that upload your data to external servers, this editor processes files locally. Your financial records, customer data, or personal information never leaves your device—making it suitable for sensitive data editing. With support for up to 10,000 rows, it handles substantial datasets while maintaining smooth browser performance.
Export back to original format or convert between CSV and Excel as needed. Whether you're cleaning data for analysis, quick-editing a price list, or modifying a contact database, this editor provides the essential spreadsheet functionality without the bloat of full office suites.
Key Benefits of Using Online Spreadsheet Editor
Technical Specifications
Online Spreadsheet Editor vs Competitors
vs Microsoft Excel Online
Online Spreadsheet Editor Advantages
- ✓No account needed
- ✓No subscription
- ✓Privacy-focused
- ✓Instant access
Microsoft Excel Online Limitations
- ✗Requires Microsoft account
- ✗Paid subscription
- ✗Cloud-only
- ✗Heavy interface
Pricing Comparison
Online Spreadsheet Editor: Free Forever
Microsoft Excel Online: Microsoft 365 subscription
vs Google Sheets
Online Spreadsheet Editor Advantages
- ✓No signup
- ✓Offline capable
- ✓No Google account
- ✓Lightweight
Google Sheets Limitations
- ✗Requires Google account
- ✗Uploads to cloud
- ✗Privacy concerns
- ✗Internet dependent
Pricing Comparison
Online Spreadsheet Editor: Free Forever
Google Sheets: Free (Google account required)
vs LibreOffice Calc
Online Spreadsheet Editor Advantages
- ✓Browser-based
- ✓No install
- ✓Portable
- ✓Quick loading
LibreOffice Calc Limitations
- ✗Desktop only
- ✗Heavy software
- ✗Download required
- ✗Slow startup
Pricing Comparison
Online Spreadsheet Editor: Free Forever
LibreOffice Calc: Free (desktop install)
Troubleshooting Common Issues
Issue: Large files cause browser to slow down or crash
Solution: The editor handles up to 10,000 rows well. For larger files, try splitting data into smaller chunks, or use our File Converter to extract specific sheets. Close browser tabs to free memory.
Issue: Formatting not preserved after saving
Solution: This editor focuses on data values. Complex formatting (colors, fonts, borders) and formulas are not preserved. Use Excel or Google Sheets for formatting-heavy spreadsheets.
Issue: Auto-save data lost after clearing browser data
Solution: LocalStorage is cleared when you clear browser cookies/data. Export your work regularly as XLSX or CSV to preserve changes. The editor warns before leaving with unsaved changes.
Best Practices for Using Online Spreadsheet Editor
Security & Privacy Features
Performance Metrics
Edit spreadsheets up to 10,000 rows
Import files up to 5MB
Sub-second sorting and filtering
Zero server round-trips for all operations