Email attachment limits — typically 10-25MB depending on the provider — catch people off guard more often than they should. The good news is there are several reliable ways to send large PDFs, and most of them are free.
Compress First, Then Decide
Before looking at alternative delivery methods, check whether the file actually needs to be that large. A PDF Compression tool can reduce most PDFs by 50-80% without visible quality loss — a 30MB file often compresses to 5-6MB, which goes through email without any workarounds. Takes about a minute and is worth trying first.
The cases where compression doesn't help much: PDFs that are already well-optimized, or files where the content is mostly high-resolution photography that can't be reduced further without visible degradation. For those, a different delivery method is the right answer.
Cloud Storage Link: The Most Practical Option
Upload the PDF to Google Drive, Dropbox, or OneDrive and share a link. The recipient clicks the link and downloads directly — no email size limits, no waiting for a large attachment to transfer, no bounced messages. Google Drive allows up to 5TB per file, so size is effectively not a constraint.
When sharing sensitive documents this way, set the link permissions appropriately. "Anyone with the link" is convenient but means anyone who gets forwarded that link can also access the file. For confidential documents, restrict to specific email addresses or set a link expiry date if the platform supports it.
WeTransfer for One-Off Transfers
WeTransfer's free tier allows files up to 2GB with no account required. Upload the file, enter the recipient's email address, and WeTransfer sends them a download link. The file is available for 7 days before being deleted. It's a good option when you need to send a large file to someone who doesn't have Google Drive or Dropbox, and you don't want to deal with cloud storage setup.
When the Recipient Has a Size Limit on Their End
Some corporate email systems reject large incoming attachments regardless of what the sender's provider allows. If a recipient's organization has a 10MB attachment limit and you're sending 8MB, it may still bounce depending on email server overhead. A cloud link sidesteps this entirely — the email itself is tiny (just a URL), and the actual file transfer happens outside the email system.
If you regularly send large files to the same people, establishing a shared folder in Google Drive or Dropbox is cleaner than sending individual links each time. Drop files into the folder and they're immediately available — no sending required.