Attachment stays on your device
Standard compression runs locally in your browser, which avoids sending the document to our servers before you email it.
Compress a PDF for email
Make a PDF attachment easier to send without uploading it to CompressMyPDF. This page starts with the strongest compression preset.
Choose PDF files
or drop them here · multiple files supported
PDF≤ 500 MB
Processed locally · No file upload · No sign-up
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Start small, then review
Use Maximum compression first. Check the resulting size and readability, then try Balanced if images need more detail.
Prepare a PDF attachment
- 1
Select the attachment
Choose the PDF you plan to email. Multiple files can be processed as a batch.
- 2
Compress for size
Keep Maximum selected for the smallest practical output, then let the browser process the file.
- 3
Check and attach
Download the result, confirm it is readable, and attach that copy to your message.
Email attachment questions
Will the PDF fit my email provider’s limit?
It depends on the original document and your provider’s attachment limit. The result shows the exact compressed size so you can decide before sending.
Can CompressMyPDF target an exact file size?
No. Compression results depend on the PDF’s images, fonts, and existing optimization. Try Maximum first, then review the measured output.
Which preset is best for email?
Maximum usually creates the smallest attachment. Balanced is a better choice when image detail matters more than reaching the lowest size.