Compress PDF for Outlook
Reduce PDF size for Outlook's 20MB attachment limit. Browser-based compression — no file upload needed. Fast and free.
What problem does this solve?
Microsoft Outlook caps email attachments at 20MB (some corporate setups are even lower). This tool helps you compress your PDF to fit within Outlook's limit.
Who needs this?
- Outlook users hitting the 20MB attachment cap
- Corporate employees with strict email size policies
- Anyone sending large PDFs through Microsoft 365
How to use this tool
- Upload your PDF
Select the PDF that exceeds Outlook's 20MB limit.
- Compress
Choose a compression preset and reduce the file size.
- Check the output size
Verify the compressed file is under 20MB.
- Attach to Outlook
Download and attach to your Outlook email.
Upload one PDF file
Drag and drop files here, or browse from your device.
Compression options
Use the full tool
This guide uses our Compress PDF tool. Visit the main tool page for all features and options.
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FAQ
My company limits attachments to 10MB. Can this help?
Yes. Use medium or high compression to get your PDF well below 10MB.
Does this work with Outlook Web?
Yes. The tool works in any browser, including when you use Outlook in a web browser.