To email a large PDF file, you can compress or split it, remove pages you don't need, or share it as a link instead of attaching it.
Sending large e-documents may not always go as planned, as many channels have size limits. For instance, Gmail's limit is 25 MB, and attachments also grow by about a third when they are encoded for email, so a file close to the limit can still fail.
Luckily, there are several quick ways to send large PDF files via email. Read on to compare them, follow the steps for each, and learn how to fix the “file too large” error in Gmail, Outlook, and other email services.
Key Takeaways
- Emailing large PDFs can be difficult due to size limits, attachment restrictions, and lengthy upload and delivery.
- Compressing a PDF is usually the fastest way to send a large file through Outlook, Gmail, Yahoo, and other email services. Splitting the file or removing pages helps when compression alone is not enough.
- Sharing a link avoids attachment limits entirely. Use permissions or a password when the document is sensitive.
- Before you send, remove pages you don't need and protect confidential PDFs with permissions or a password.
Which Method Should You Use?
If you’re not sure where to start, use this quick guide to match the situation to the right method:
Situation | Best method |
|---|---|
The file is only a little over the limit | |
The recipient needs everything in one file | Compress it; if it is still too big, share a link |
Your recipient's email can't handle large attachments or blocks links | Split the PDF and send the parts in separate emails |
Only part of the document is needed | Remove the pages you don’t need |
The document is confidential | Share a link with permissions or password-protect the file |
Why Large PDF Files Are Hard to Email
Large PDF files are hard to email due to size limits, slow upload and delivery, and attachment restrictions. For example, if you want to send a file over 25 MB (or over 50MB for Enterprise Plus users) as a regular Gmail attachment, Gmail will replace it with a Google Drive link, and many other providers will simply reject the message.
Moreover, email attachments are encoded when they are sent, which makes them roughly a third larger than the original file. A 20 MB PDF can therefore turn into a 27 MB message and bounce. The recipient's mail server may also have a lower limit than yours, and large files are slow to upload, download, and open online.
Most PDFs are large because of high-resolution images, scanned pages stored as pictures, or embedded fonts. Knowing this helps you pick the right fix: compression shrinks images and fonts, while removing pages cuts the file down fastest.
4 Best Ways to Send Large PDF Files via Email
The best way to send large PDF files via email is to adapt your documents to specific emailing criteria using reliable tools and then email them.
Let’s discover the top four methods for emailing large PDF files.
#1. Compress PDF to Reduce File Size
Whether you want to send a large PDF file through Gmail or another email service, one of the best ways to streamline the process is to reduce the file size. Here’s how to compress a PDF for email with pdf.net:
- Open the PDF compression tool and upload your document (files up to 500 MB are supported).
- Choose one of the three compression levels. A stronger level gives a smaller file but may lower image quality.
- Click Compress and download.
#2. Split PDF into Smaller Parts
Splitting PDFs into multiple files is another effective way to email large PDFs. Splitting does not reduce the total size, but it keeps each part under the limit. Most providers count all attachments in one message together, so you may need to send the parts in separate emails.
To split a PDF online, follow these steps:
- Open our PDF splitting tool and upload your document.
- Select all pages, then click the scissors icon after the last page you want to keep in the first part. The number of PDFs you create depends on where you place the scissors.
- Click the Split button to separate the marked pages and download the document.
#3. Remove Pages You Don't Need
Sometimes your recipient only needs part of the document. Deleting blank, duplicate, or irrelevant pages (or extracting the pages they need) can cut the file size without lowering the quality of the pages you keep.
Here’s how to remove the pages you don’t need with pdf.net:
- Go to our Organize PDF tool and upload your document.
- Hold the CTRL button on your keyboard to select the pages you want to remove.
- Press Delete in the upper right corner, and then Save & Close.
- Click Download or share your edited PDF.
#4. Share a Link Instead of Attaching the File
If compressing, splitting, or trimming is not enough, skip the attachment altogether. Your recipient clicks the link to view or download the file, so email size limits no longer matter.
The process is simple:
- Go to Share PDF and upload your file.
- Set the permissions and invite people via email or copy the link and share it via any other app.
Alternatively, use other cloud storage services like Google Drive, OneDrive, or SharePoint to upload your file and generate a shareable link.
What to Do If Your Email Still Won’t Send
If your email still won’t send, there are some of the possible reasons:
- The message bounced as “too large.” Remember that encoding adds about a third to the size. Compress the PDF further, remove pages, or share a link.
- Your email is sent, but your recipient never receives it. Their mail server may have a lower limit than yours. Ask for it, or send a link instead.
- The parts are still too large together. Most providers count all attachments in one message, so send each split part in its own email.
- Your recipient can’t open the link. Some email filters block links from unknown senders. Tell them to expect your message, or switch to a smaller attachment.
- The PDF is digitally signed. Compressing or editing a signed PDF can invalidate the signature. Send the original as a link instead.
Final Thoughts
Emailing large PDFs is much easier with compression and splitting tools: compression makes the file smaller, splitting keeps each part under the limit, and removing unneeded pages trims it further. When none of these is enough, share a link instead of attaching the file, and add permissions or protect a PDF if it’s sensitive.
How to Email a Large PDF File FAQs
#1. What is the maximum PDF file size I can send via email?
There is no single maximum, because it depends on your provider: Gmail, Outlook.com, and Yahoo allow about 25 MB, iCloud Mail allows 20 MB, and work or school accounts follow limits set by an administrator. Since email encoding adds about a third to the size, aim to stay well under the limit.
#2. How do I reduce the size of a PDF without losing quality?
Choose a lighter compression level. The strongest level gives the smallest file but may lower image quality, so compare the result with your original before sending.
#3. Is it better to compress or split a PDF for email?
Whether you should compress or split a PDF for email depends on how important it is to keep a single file for your receiver. If your receiver does not mind using PDFs separately or merging them into one after receiving them, you can split them; otherwise, you should shrink them. In most cases, compress first and split only if the file is still too large.
#4. Can I send a large PDF without attaching it?
Yes, you can send a large PDF without attaching it using cloud services or by sharing a PDF link with pdf.net. To do so, upload the PDF to the platform, choose who can open it, copy the link, and paste it into your email.
#5. Does zipping a PDF make it small enough to email?
Rarely. PDFs are already compressed, so a ZIP file typically saves little space. Compression with a PDF tool works better.