How do I send a PDF file?
Written by Cameron James·August 18, 2026Quick answer
To send a PDF file, attach it to an email if it is small enough: personal Gmail accounts cap attachments at 25 MB, and Outlook defaults to 20 MB for internet email accounts and 10 MB for Exchange mailboxes. Above that, upload the PDF somewhere and send a link instead, which is what Gmail does automatically by swapping an oversized attachment for a Google Drive link. For anything you need to update later or want to know was read, send the link by default rather than the file.
Key facts
- Personal Gmail accounts have a 25 MB attachment limit. Work and school accounts use whatever limit the Google Workspace administrator sets.
- If the total attachment size goes over the limit, Gmail removes the attachment and adds it as a Google Drive link instead.
- Outlook 2013 and later default to 20 MB for POP3, IMAP and HTTP accounts, and 10 MB for Exchange Server mailboxes, though administrators can change the Exchange figure.
- The recipient's receiving limit matters as much as your sending limit. A PDF under your cap can still bounce at their mail server.
- An attachment is a copy. Once it is sent you cannot correct it, replace it or see what happened to it.
- A shared link keeps one version in one place, so a late fix reaches everyone who opens it afterwards.
- Email is not private by default. For contracts and anything sensitive, use a link with permissions rather than a raw attachment.
Attach it, or link it
Attaching is fine for a small, finished PDF going to one person who will read it once. Drag it into the email and send it. The moment the file is big, the moment more than a couple of people need it, or the moment there is any chance you will spot a typo tomorrow, a link is the better answer. Upload the PDF to Google Drive, Dropbox or OneDrive, set the sharing to anyone with the link, and paste that in.
The size limit that actually bites is theirs, not yours
Everyone checks their own sending cap and forgets the other end. I have watched a proposal sail out of a 25 MB Gmail account and hit a wall at a corporate mail server that would not take anything over 10 MB, which is Outlook's Exchange default. The sender saw nothing useful for hours. If the PDF is heavy, either compress it or skip the guessing and send a link, because a link is a few hundred bytes no matter how fat the document is.
When you need to know it landed
Sending a PDF is easy. Knowing whether anyone read past page two is the part email cannot help with, and that gap gets expensive on proposals, decks and reports. A tracked link solves that bit. LiveDocument turns the PDF into one shareable link with page level engagement analytics, and lets you attach a recorded video walkthrough so the reader gets your explanation alongside the document rather than in a separate email. It is not a PDF editor, and it does not do watermarking or NDA gating, so if you need those, DocSend is the honest pointer. For a plain "have the file, no strings", Drive or a straight attachment is still the shortest path.
The Bottom Line
Attach the PDF if it is small, final and low stakes. Send a link for anything large, anything you might revise, and anything where knowing it was actually opened changes what you do next.
Written by Cameron James