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Office Online has the following file size limits:

No limit, but subject to the 60 second time out for file downloads.

5 MB maximum file size for Edit and Preview.

300 MB maximum file size for Edit and Preview.

<br><a href="https://wopi.readthedocs.io/en/latest/faq/file_sizes.html" rel="nofollow noopener noreferrer" target="_blank">Read more details about file sizes supported by Office Online</a>

What are the file sizes supported by Office Online?

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