Compress Excel File Online – Reduce XLSX Size
Reduce the size of your spreadsheets by cleaning metadata and optimizing structure.
Related Excel tools: Compare Excel | Auto VLOOKUP | Add Serial Number | Bulk Find & Replace
Drag & Drop or Click to Upload Excel File
Compress Excel File Online
Large Excel files are difficult to email, slow to open and consume excessive storage space. Excel file compression reduces file size by eliminating unused formatting, recalculation chains and bloated metadata.
Why Excel Files Become Large
- Formatting applied to entire columns
- Unused blank rows and columns
- Embedded metadata
- Cached formulas
- Hidden calculation history
Smart XLSX Optimization
This tool rebuilds your workbook internally using optimized XML structures. Unlike ZIP tools, it understands Excel’s internal architecture and removes junk safely.
What Gets Removed Safely
- Unused formatting
- Empty styles
- Calculation cache
- Redundant shared strings
What Is Never Changed
- Formulas
- Cell values
- Charts
- Pivot tables
- Worksheet layout
Common Use Cases
- Email Excel attachments
- Upload limits on portals
- Cloud storage saving
- Slow workbook performance
- Backup size reduction
No Excel Installation Required
This tool works entirely in your browser. Microsoft Excel or Office software is not required.
Privacy & Security
All compression happens locally on your device. Files are never uploaded or stored on servers.
Frequently Asked Questions
Is Excel compression safe?
Yes, only unused data is removed.
Will formulas break?
No, formulas remain unchanged.
Does it support XLS?
No, convert XLS to XLSX first.
Is this tool free?
Yes, unlimited usage.