Email attachment limit

Compress a PDF to Email It

Email bouncing back because your attachment is too large? Most providers cap attachments at a fixed size, and a single scanned PDF can easily go over it.

Gmail allows attachments up to about 25MB, and Outlook around 20MB, but recipients on stricter servers may reject anything large. Compressing your PDF first keeps the email deliverable.

While using the browser tool, your PDF is processed locally in your browser. Pick a target that fits your provider, check the preview, and attach a smaller PDF that sends cleanly.

Upload-ready workflow

Choose a target size like 200KB, 500KB, or 1MB.

Preview readability before downloading the result.

Use a browser-first compression flow for everyday upload problems.

How to email a large PDF

For Gmail keep the file under about 25MB; for Outlook keep it under about 20MB. A smaller file is always safer for the recipient.

Use Best Readability for contracts, invoices, and official documents.

Use Grayscale Scan for scanned letters and forms to cut size quickly.

If the PDF is still too large, split it or share a download link instead of attaching everything.

Try it with your PDF

Upload your PDF, pick a target that fits your email provider, and download a version small enough to send.

Compress Your PDF

Upload a PDF, pick your target size, and compress — all in your browser.

Upload PDF

Drag and drop or click to browse

Drop your PDF here

or click to browse

PDF only. Your file is processed in your browser.

Preview & Results

PDF preview will appear here

Upload a PDF to see a preview of the first page

Frequently asked questions

What is the Gmail attachment size limit?

Gmail allows attachments up to about 25MB. Larger files are sent as Google Drive links instead. Always keep some margin for the recipient mail server.

What is the Outlook attachment size limit?

Outlook.com typically limits attachments to around 20MB. Compressing your PDF below that keeps the message deliverable.

Why was my email rejected even under the limit?

The recipient mail server may enforce a stricter limit than your provider. Sending a smaller, compressed PDF reduces the chance of a bounce.

Does my PDF upload to your server?

No. The browser tool processes your PDF locally. Nothing is uploaded or stored.

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