The basic steps to attach and send a PDF

To send a PDF in an email, you open your email program, start a new message, add the PDF as an attachment, and then send it. The exact steps depend on whether you're using webmail (like Gmail or Outlook.com in your browser), a desktop program (like Outlook or Apple Mail), or a phone app. The core process is the same across all of them: find the attachment button, select your PDF file, and hit send.

Most email programs put the attachment button in the message composition area. It usually looks like a paperclip icon. When you click it, your computer opens a file browser where you can navigate to wherever you saved your PDF and select it. Once you've chosen the file, it attaches to your message and you can send normally.

Key Takeaways

  • Every email program has an attachment button (usually a paperclip icon) that lets you select files from your computer to send with your message.
  • You can attach multiple PDFs to a single email, but the total file size matters — most email services reject messages larger than 20 to 25 megabytes.
  • If your PDF is too large to email, you can compress it, split it into smaller files, or use a file-sharing service like Google Drive or Dropbox instead.
  • The person receiving your email needs to have a PDF reader installed, but nearly all computers and phones come with one built in.

Attaching a PDF in Gmail

Open Gmail in your browser and click the Compose button to start a new message. Type in the recipient's email address, a subject line, and your message text. Below the message box, you'll see a paperclip icon — click it to attach your PDF.

A file browser window opens. Navigate to the folder where your PDF is saved, click the file once to select it, and then click Open. The file attaches to your message and you'll see its name appear below the compose box. Click Send when you're ready. If you need to attach more than one PDF, click the paperclip icon again after the first file is attached.

Attaching a PDF in Outlook (desktop or web)

In Outlook on your computer, click New Email to start a message. Fill in the recipient, subject, and message body. Look for the Attach button in the toolbar at the top — it usually shows a paperclip. Click it and select your PDF from the file browser that opens.

In Outlook.com (the web version), the process is similar. Click New Message, fill in your details, and look for the paperclip icon near the bottom of the compose area. Click it, select your PDF, and the file attaches. You can add multiple files before sending.

Attaching a PDF on your phone or tablet

On an iPhone or iPad, open the Mail app and tap Compose. Write your message, then look for the attachment icon — it's usually a paperclip or a plus sign. Tap it and select your PDF from your Files app or Photos app, depending on where you saved it. On Android, the process is similar: open your email app, start a new message, tap the attachment icon (paperclip or plus), and browse to your PDF.

Some phones make it easier to attach files if you save your PDF to a cloud service like iCloud, Google Drive, or OneDrive first. Then you can attach it directly from within the email app without hunting through your phone's file system.

What to do if your PDF is too large to email

Email services have size limits. Gmail, Outlook, and Yahoo all reject messages larger than 20 to 25 megabytes. If your PDF is bigger than that, you have a few options. The first is to compress the PDF — most PDF readers have a compress or reduce file size option in their menu. This usually shrinks the file enough to email, though it may reduce image quality slightly.

If compression doesn't work, split the PDF into smaller pieces. Many PDF readers let you extract specific pages and save them as separate files. You can then email each piece separately, or attach multiple smaller PDFs to one message as long as the total stays under the limit.

The easiest option for very large files is to use a file-sharing service instead. Upload your PDF to Google Drive, Dropbox, OneDrive, or a similar service, then send the recipient a link to download it. This avoids email size limits entirely and works for files of any size.

Making sure the recipient can open your PDF

PDFs are designed to look the same on any device, and nearly every computer and phone comes with a PDF reader built in. Windows, Mac, iPhone, and Android all have free PDF readers installed by default. When someone receives your PDF, they can open it immediately without installing anything extra.

If the recipient has trouble opening the file, the most common cause is that their email program didn't download the attachment properly. Ask them to try downloading the attachment again, or to open their email in a web browser instead of an app. If the PDF itself is corrupted, you may need to resend it or create a fresh copy of the file.

Frequently Asked Questions

Can I attach a PDF and other file types in the same email?

Yes. Click the attachment button once for each file you want to send. You can mix PDFs with Word documents, images, spreadsheets, or other file types in a single message, as long as the total file size stays under your email service's limit.

What if the recipient says they never got the attachment?

First, check that the file actually attached — look for the filename below your message before you hit Send. If it did attach, ask the recipient to check their spam or junk folder, as some email systems flag messages with attachments. If it's still missing, try sending it again or use a file-sharing link instead.

Is it safe to send PDFs through email?

Email is not encrypted by default, so sensitive information in a PDF could theoretically be intercepted. If your PDF contains passwords, financial data, or personal information, consider using a file-sharing service with password protection instead, or ask your email provider if they offer encrypted email.

Why does my attachment show as 0 bytes or won't open?

This usually means the file didn't upload properly. Delete the attachment, try attaching it again, and make sure the file is actually a valid PDF before sending. If the problem continues, try uploading the file to a cloud service and sharing a link instead.

Can I attach a PDF from my cloud storage without downloading it first?

Yes, if your email program is connected to your cloud service. In Gmail, you can attach files directly from Google Drive. In Outlook, you can attach from OneDrive. Look for the cloud storage option in your attachment menu instead of browsing your computer's files.