What is the maximum PDF size I can email?

Gmail allows 25MB, Outlook allows 20MB, and Yahoo Mail allows 25MB. However, corporate and government mail servers often restrict attachments to 10MB or even 5MB. When in doubt, keep attachments under 10MB.

How much smaller will my PDF be after compression?

Results vary by content type. A scanned PDF can shrink by 50–80%. A text-heavy business report typically compresses 10–30%. Image-heavy presentations can reduce 40–70% depending on the original image quality.

Can I email a PDF that is 50MB?

Not directly as an email attachment. Options include: compressing it with FixTools, splitting it into parts with the PDF Splitter, or uploading to Google Drive or Dropbox and sharing a link instead.

Does email compression affect digital signatures?

Yes. Compressing a digitally signed PDF will break the signature because the file content changes. If your PDF has a verified signature, consider sharing via a link rather than compressing it.

Is it free to compress PDFs for email with FixTools?

Yes, completely free. There are no daily limits, no account needed, and no watermarks added to your compressed PDF.

What if my recipient says the file is too large to open?

Some email clients struggle to preview very large inline PDFs. Try compressing below 5MB, which ensures smooth previewing in virtually all email clients on both desktop and mobile.

Free · Fast · Privacy-first

Compress PDF for Email Attachments

Email providers cap attachment sizes — Gmail at 25MB, Outlook at 20MB, and many corporate mail servers at 10MB or less. FixTools compresses your PDF in seconds so it slides under any email limit without losing the quality your recipient needs to read it clearly.

⚡ Use Tool Now How it works

Cost: Free forever
Sign-up: Not required
Processing: In your browser
Privacy: Files stay local

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Fits all major email attachment limits

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No watermark on compressed output

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Instant — process in under 30 seconds

PDF Tool

PDF Compressor

All processing happens in your browser — your files are never uploaded to any server.

🚀Open PDF Compressor

100% Free · No account · Works on any device

How to use this tool

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Upload your PDF and choose medium compression. For very large PDFs above 20MB, use high compression or split the document and send it in parts.

How It Works

Step-by-step guide to compress pdf for email attachments:

1
Open the PDF Compressor
Navigate to the PDF Compressor tool — no install or sign-up needed.
2
Upload your PDF
Drag your PDF onto the tool or click to select the file from your computer.
3
Pick a compression level
Choose medium for most documents. Select high if your PDF is above 15MB and needs to stay under 10MB for corporate email.
4
Download and attach
Download the compressed PDF and attach it to your email as you normally would.