How to send a large PDF by email

By Nick Pears ·Published 20 October 2026

Most email services stop at 20 to 35 MB per message, and an attachment grows by about a third on the way. To send a PDF bigger than that, make the file smaller, or send a link to it instead of the file itself.

One way is to turn the PDF into a link: upload it, paste the link into your email, and it opens in the reader's browser with nothing to download. We make EveryPage, so every limit below for other services comes from that provider's own help page, checked in October 2026.

Email attachment limits (October 2026)

Email attachment size limits and what each provider offers above the limit, October 2026
Provider	Attachment limit	Above the limit
Gmail	25 MB	Sends a Google Drive link
Outlook.com	25 MB	OneDrive link, up to 2 GB
Microsoft 365 (work)	35 MB by default; your admin can change it	OneDrive link
Yahoo Mail	25 MB per message	See note below
iCloud Mail	20 MB	Mail Drop link, up to 5 GB, 30 days
Proton Mail	25 MB	No link option in Proton's help

Each provider name links to the help page the numbers come from. Outlook's desktop app uses 20 MB for Outlook.com and Gmail accounts even though Outlook.com itself allows 25 MB (Microsoft Support). Yahoo counts every attachment in the message together. Yahoo's AT&T Mail help offers a Google Drive or Dropbox link for bigger files (Yahoo Help); its standard Mail help does not mention one.

Why a PDF under the limit still bounces

Email carries attachments as text, and that encoding makes them about 33 percent larger (RFC 2045, the email standard). A 20 MB PDF arrives as roughly 27 MB, which is over Gmail's 25 MB. The message text and any other attachments count too. As a rule of thumb, keep a PDF under about three quarters of the limit: 18 MB for a 25 MB service.

Option 1: make the PDF smaller

Scanned pages and photos are usually most of a PDF's size, so compressing images is what helps.

On a Mac: open the PDF in Preview, choose File > Export, then pick Reduce File Size from the Quartz Filter menu. Apple warns the result may be lower quality than the original (Preview Help), so check the pages before you send.
With Adobe Acrobat: online, choose Convert > Compress a PDF (Adobe Help); in the desktop app, choose File > Save as Other > Reduced Size PDF (Adobe Help).
Zipping rarely helps. PDFs are already compressed inside, so a zip file of a PDF is usually only a little smaller, and the reader has to unzip it.

Option 2: send a link instead of the file

With a link, the size limit is the link service's, not your email's, and the email stays small. There are three common ways.

Gmail and Google Drive. Above 25 MB, Gmail puts the file in Google Drive and sends a link. If your recipients cannot open it, Gmail asks you to change the sharing settings before it sends (Gmail Help). Choose "Anyone with the link" if they do not use Google accounts.
Outlook and OneDrive. Outlook.com shares larger files from OneDrive, up to 2 GB (Microsoft Support).
iCloud Mail Drop. From Apple Mail or iCloud.com, Mail Drop sends files up to 5 GB as a link that lasts 30 days (Apple Support).

If you want the PDF to open straight in the reader's browser, page by page, with nothing to download, or to see whether it was opened, use a PDF link:

Go to PDF to link and drop the PDF in. No account is needed.
Copy the link and paste it into your email.
The reader taps it and the PDF opens in their browser, page by page, with nothing to download.

Without an account the link lasts 7 days and the PDF can be up to 20 MB. A free account keeps the link working until you choose to end it and shows how many times it was opened. Basic takes PDFs up to 200 MB and shows how far each reader got; Pro takes up to 2 GB (pricing).

Option 3: a file transfer service

Transfer services email the recipient a download link. WeTransfer's free plan sends up to 3 GB per transfer, 10 transfers or 3 GB in any 30 days, and free transfers can be downloaded for 3 days (WeTransfer: file size, plan limits, availability). That suits one-off files the reader will save, less so a document you want them to read online or come back to.

Which to use

It only just misses the limit: compress it and send it as an attachment.
The reader needs to save or print the file: your mail provider's own link (Drive, OneDrive or Mail Drop) or a transfer service.
The reader just needs to read it, maybe on a phone: a PDF link.
You want to see whether it was opened: a free EveryPage account shows how many times the link was opened; see how to track a PDF sent by email.

Questions

Why can't I email my PDF?

It is probably over your email service's size limit: 25 MB for Gmail, Outlook.com, Yahoo and Proton, 20 MB for iCloud Mail. Attachments grow by about a third when sent, so a 20 MB PDF can fail under a 25 MB limit. Compress the PDF or send a link to it instead.

How do I make a PDF smaller for email?

On a Mac, open it in Preview, choose File > Export and pick Reduce File Size from the Quartz Filter menu; Apple warns quality may drop, so check the pages. In Adobe Acrobat, use Compress a PDF online, or Save as Other > Reduced Size PDF in the desktop app. Images are usually most of the size, so scanned PDFs shrink the most.

What do I do if my PDF file is too large to save or send?

Save a smaller copy: Reduce File Size in Mac Preview or Reduced Size PDF in Adobe Acrobat, then check the pages, because image quality can drop. If it is still too big for email, send a link to it instead of attaching it.

Will zipping a PDF make it small enough to email?

Usually not by much. PDFs are already compressed inside, so a zip file is only a little smaller, and the reader has to unzip it before they can read it.

What's the best way to send a big PDF?

Send a link instead of the file. Gmail, Outlook.com and iCloud Mail Drop can do this for you through Google Drive, OneDrive or Mail Drop. If you want the PDF to open in the reader's browser, page by page, or to see whether it was opened, upload it to a PDF link service such as EveryPage and paste the link into your email.

How large a PDF can I share with EveryPage?

Up to 20 MB without an account or on the free plan, 200 MB on Basic and 2 GB on Pro. A link made without an account lasts 7 days; with a free account it keeps working until you choose to end it.

PDF to link, free PDF hosting compared, embedding a PDF in an email, and how to send a PDF securely.

Send the link, not the file.

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