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How to compress a PDF for email and send lighter attachments
Updated on May 9, 2026
When a PDF gets too large, email becomes a problem. This page was built to answer that exact intent: reduce the size of the PDF so it is easier to send without making the document unusable.
Why compress a PDF before sending by email
Many email providers limit attachment size. When the PDF goes over that limit, the send fails or forces extra steps.
By compressing the PDF before sending, you reduce attachment weight, speed up upload and improve the chance that the recipient gets the file without errors.
Which level to choose
- Low compression: better for contracts, proposals and files where readability needs to stay sharper.
- Recommended compression: a good fit for most email attachments.
- Extreme compression: best when the PDF must be as small as possible to fit the attachment cap.
Practical tips for sending a PDF by email
- Start with recommended compression and check whether the final size already solves the problem.
- If the file is still large, try extreme compression on a copy of the PDF.
- Keep the original version in case you need to resend it with maximum quality.
Frequently asked questions
How do I compress a PDF so it fits in email?
Upload the file to the tool, choose a compression level and generate a smaller version to attach to your email.
What is the best level for sending a PDF by email?
In most cases, recommended compression gives the best balance between file size and document readability.