How to analyze and reduce excel workbook size before sharepoint or teams upload
- Step 1Download the file from SharePoint/Teams — Save the current version locally before making changes.
- Step 2Analyze with Weight Analyzer — Upload to identify the top size contributors.
- Step 3Apply targeted cleanup — Use appropriate JAD tools: VBA Stripper for macros, Comment Purger for notes, compress images in Excel.
- Step 4Re-upload optimized file — Upload the optimized version to SharePoint/Teams and delete the oversized previous version.
Frequently asked questions
Does SharePoint automatically compress Excel files?+
SharePoint does not compress file contents — it stores them as uploaded. XLSX files are already ZIPped internally, so external compression provides minimal benefit.
What Excel file size is optimal for SharePoint co-authoring?+
Files under 5MB open and co-author smoothly in Excel Online. Files above 20MB may experience slower save synchronization and co-authoring conflicts.
Privacy first
Every JAD Excel tool runs entirely in your browser using SheetJS and ExcelJS. Your spreadsheets, formulas, and data never leave your device — verified by zero outbound network requests during processing.