Guide
How to compare two Excel files
Updated August 30, 2026
Quick answer
To compare two Excel files online, upload Version A (older) and Version B (newer) to a visual diff tool, map sheets if needed, then review changes in a grid that highlights values, formulas, styles, images, and structure. Excel Change Log supports .xlsx and .csv with a free demo and no desktop install.
How do I label Excel versions before comparing?
Label the older file Version A (original) and the newer file Version B (modified). Consistent naming reduces mistakes when you compare multiple rounds in a week.
Where can I compare Excel files online for free?
Open the free demo to try sample workbooks instantly, or create a free account for 3 MB files and saved history. Supported formats: .xlsx and .csv.
How do I map sheets between two workbooks?
For multi-sheet workbooks, match sheets between versions (auto-match works when names are unchanged). The demo compares up to five sheets; Pro compares all sheets.
What should I look for in a visual Excel diff?
Use the change list to jump to edits. Toggle unified or side-by-side view. Pay attention to formula, style, image, and chart badges — not only value changes.
How do I share Excel comparison results?
Generate a share link for reviewers or export from your account dashboard. Pro adds AI summaries when you need a written narrative alongside the grid.