Microsoft Excel Container Caches
This folder stores Microsoft Excel cache files inside its macOS app container to speed up launches, previews, and other temporary app tasks.
What is Microsoft Excel Container Caches?
This folder is part of Microsoft Excel's sandboxed container on macOS. It holds cached data that Excel creates while running, such as temporary app resources, reusable file data, and other short-term information meant to improve performance and responsiveness. People typically encounter it when reviewing storage use in their Library folder or when troubleshooting Excel behavior.
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Safety overview
Status: Mostly safe
Cache contents are generally temporary and are usually recreated by Excel as needed. Removing them is low risk compared with deleting documents or support data, but it can sign you out of some temporary app state, clear cached content, or cause Excel to rebuild data on next launch. Excel should be closed first.
Recommendation: Keep it if Excel is working normally and space use is small. If Excel is closed and you need to free space or troubleshoot app issues, this cache folder is usually reasonable to remove, with the expectation that Excel may start more slowly once and recreate it later.
File path
~/Library/Containers/com.microsoft.Excel/Data/Library/Caches
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