How to Reduce PDF Size for Email Attachments
Get your PDF under common 10–25 MB email limits.
Email providers cap attachment sizes (often 10–25 MB). If your PDF bounces, you need to make it smaller before sending.
ChangeMyPDF runs entirely in your browser — your files never leave your device, there's nothing to install, and you can start without an account. Here's exactly how to do it.
Step-by-step
- Compress the PDF to re-encode images and structure.
- If still large, split it into parts and send separately.
- Or convert pages to JPG and zip them.
- Attach the smaller file and send.
Tips for the best result
- Scanned documents shrink the most.
- Aim well under the limit to leave room for the email body.
Is it safe and free?
Yes. Most ChangeMyPDF tools process files locally in your browser, so documents are never uploaded to a server. Free accounts can run a few operations per hour; a Week Pass or Premium plan removes the limit and ads if you need to do more.
Frequently asked questions
Do my files get uploaded to a server?
For most tools, no — the work happens in your browser, so your documents stay on your device.
Is it really free?
Yes. Free users get a few runs per hour. For unlimited use and no ads, grab a $5 Week Pass or a Premium plan.
Which browsers are supported?
Any modern browser — Chrome, Edge, Firefox, and Safari on desktop and mobile.