Email Attachment Too Large? Reduce File Size Instantly

Email bouncing because your PDF attachment is too large? Compress it below 20MB instantly — safe for Gmail, Outlook, and Yahoo Mail.

⚡ File Size Limits (Quick Fix)

•Gmail's attachment limit is 25MB per email for personal accounts.
•Outlook.com and Hotmail cap email attachments at 20MB.
•Yahoo Mail allows email attachments up to 25MB per message.
•Attachments are base64-encoded in transit, adding ~33% overhead. A 20MB file becomes ~27MB on the wire.

👉 Fix: Compress your file below 20 MB using the tool above.

📄

Drop your PDF here

or click to upload — PDF only

Target size (optional)

targeting 20 MB

How to use this tool

Select or drag and drop your file into the tool above.
Adjust the settings or target size as needed for your specific requirement.
Wait a moment while your file is processed directly in your browser.
Download the final file safely to your device.

About this tool

Gmail and Yahoo allow 25MB attachments; Outlook caps at 20MB. Compressing to under 20MB ensures your PDF sends successfully on all major email platforms without bouncing.

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PDF Too Large for Gmail? Compress Below 25MB Instantly

Gmail rejecting your PDF attachment? Compress below the 25MB limit instantly — free, no signup.

💡 Good to know

→Gmail's attachment limit is 25MB per email for personal accounts.Google Help ↗
→Outlook.com and Hotmail cap email attachments at 20MB.Microsoft Support ↗
→Yahoo Mail allows email attachments up to 25MB per message.Yahoo Help ↗
→Attachments are base64-encoded in transit, adding ~33% overhead. A 20MB file becomes ~27MB on the wire.

❓ Frequently Asked Questions

Why is my email attachment being rejected?+

Most email providers cap attachments at 20–25MB. Gmail and Yahoo allow 25MB; Outlook allows 20MB. Compress your PDF below 20MB to ensure it sends on all platforms.Source: Google Help ↗

What is the safest file size for email attachments?+

Under 20MB. This is safe for Gmail (25MB limit), Outlook (20MB limit), and Yahoo Mail (25MB limit).Source: Google Help ↗

How do I reduce my email attachment size?+

Compress your PDF using the tool above. This reduces embedded image quality and removes redundant data, bringing the file below the email attachment limit.Source: Google Help ↗

What should I do if I can't compress the PDF small enough?+

Upload the file to Google Drive, OneDrive, or Dropbox and share a link in your email instead of attaching the file directly.Source: Google Help ↗

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