Compress a PDF for email
A 10 MB target is preselected: small enough for most mail services, even after encoding. No upload needed.
France · Scheduled cleanup: 60 min after job creation · Free to use
Formats & limits
Formats & limits
- Accepted formats
- Result
| On a computer | On a phone or tablet | In the cloud | |
|---|---|---|---|
| Max file size | 250 MB | 80 MB | 100 MB |
| Max pages | No limit | No limit | 2000 |
Scheduled cleanup: 60 min after job creation · Usually about 20 s
Limits on your device depend on its memory. Larger files may still work; the tool warns you first.
How it works
- 01 Drop the PDF you want to send.
- 02 Keep 10 MB, or choose 5 MB for strict company mail.
- 03 Compress and download the smaller copy.
- 04 Attach it to your message as usual.
About this tool
Mail services cap the size of a message, commonly at 20 or 25 MB, and an attachment grows by about a third on the way because it is encoded as text. A 19 MB PDF can therefore bounce although it looks under the limit. This page preselects 10 MB, which fits the usual providers with room to spare; strict company servers may need 5 MB. Hushdesk shrinks the images inside the PDF on your own device, keeps the text sharp and gives the file a clear “_compressed” name, ready to attach.
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Sized for real mail limits
The default leaves headroom for encoding overhead, so the message is not rejected after you press Send.
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Keeps the document usable
Links, bookmarks and form fields survive, and the recipient can still search and copy the text.
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Confidential mail stays confidential
Contracts, invoices and medical letters are compressed locally, so a private document is not handed to yet another service.
Questions and answers
What is the attachment size limit in email?
Most providers allow 20–25 MB per message, and some company servers only 10 MB. Because attachments are encoded as text, the file itself should be about a quarter smaller than the limit. A 10 MB PDF is a safe choice almost everywhere.
Why was my email rejected although the PDF is 20 MB?
Encoding adds roughly 33 %, so a 20 MB attachment becomes about 27 MB inside the message, which exceeds a 25 MB limit. Compressing to 10 MB, or to 15 MB for a 25 MB limit, avoids the bounce.
Will the recipient notice a quality difference?
Usually not on screen. Text and vector drawings are unchanged, and photos keep the best quality the target allows. For documents meant for printing, choose a larger target such as 20 MB if your mail service accepts it.
Can I send several PDFs in one email?
Yes, but the limit applies to the whole message. Compress each file so that their sum, plus about a third for encoding, stays under the limit, or merge them into one PDF first.