Compress PDF for Outlook
Outlook and Hotmail restrict attachments to 20MB. Compress your PDF here before attaching it to your email.
š
Drop your PDF here
or click to upload ā PDF only
Target size (optional)
targeting 20 MB
š” Good to know
- āOutlook.com and Hotmail cap email attachments at 20MB.Microsoft Support ā
- āMicrosoft 365 (work/school) accounts may have a higher limit of up to 25MB, set by the organisation's admin.Microsoft Docs ā
- āOutlook desktop (the app) can send larger files via OneDrive links, bypassing the 20MB attachment limit.Microsoft Support ā
- āFiles blocked by Outlook include .exe, .bat, .vbs, and other executable types regardless of size.Microsoft Support ā
ā Frequently Asked Questions
What is Outlook's attachment size limit?+
Outlook.com and Hotmail allow up to 20MB. Microsoft 365 work accounts may allow up to 25MB depending on admin configuration.
How do I send a PDF larger than 20MB in Outlook?+
Upload the file to OneDrive and share the link. Outlook will offer to do this automatically when you attach a large file.
Does compressing to 19MB guarantee Outlook delivery?+
Yes for Outlook.com. For Microsoft 365 accounts, the limit depends on your organisation's settings.
Is there a difference between Outlook.com and Outlook desktop limits?+
Yes. Outlook.com (web) enforces 20MB. Outlook desktop can attach larger files by converting them to OneDrive links automatically.