Merge PDF Files for Email Attachments

Name: ZiaSign AI
Brand: ZiaSign

Combine multiple PDFs into one file before sending via email

Why Merge PDF Files for Email Attachments?

Email clients like Gmail (25 MB) and Outlook (20 MB) limit attachment sizes and count. Merging multiple PDFs into a single document keeps your emails professional, organized, and under size limits. Instead of attaching 5 separate files, send one clean PDF.

How to Merge PDF Files for Email Attachments — Step by Step

1
Upload all the PDF files you want to email
2
Drag to arrange them in the right order
3
Click 'Merge PDFs' to combine into one file
4
Download the merged PDF and attach to your email

Open Merge PDF Tool

Frequently Asked Questions

What's the maximum file size for Gmail attachments?

Gmail allows up to 25 MB per email. If your merged PDF exceeds this, use ZiaSign's Compress PDF tool to reduce the file size, or use Google Drive links for larger files.

Can I merge PDFs on my phone before emailing?

Yes. ZiaSign works in any mobile browser — upload, merge, and attach to your email directly from your phone.

Will the merged PDF be too large to email?

If it is, merge first, then use our Compress PDF tool to reduce the size. You can typically achieve 40-90% size reduction.

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Ready to merge pdf files for email attachments?

It takes just seconds. No signup, no watermark, no limits.

Use Merge PDF Tool — Free