Use Case
Compress PDF for Email
Free online tool — no signup, no software, instant results.
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Sending a PDF via Email requires staying within its attachment limit of 25 MB (Gmail) / 20 MB (Outlook). Aim for under 5 MB for best deliverability across all email providers. Our free PDF compressor reduces file size while keeping your document readable and professional.
How to Use – Step by Step
1
Upload your PDF
Select the PDF you intend to share via Email.
2
Compress to target size
Apply medium or high compression to get below 25 MB (Gmail) / 20 MB (Outlook).
3
Share via Email
Download the compressed file and attach it to your message.
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Pro Tips
- Aim for under 5 MB for best deliverability across all email providers.
- Check the file size shown after compression before downloading.
- If sharing via mobile, compress on the same device to avoid re-uploading.
Frequently Asked Questions
What is the Email attachment size limit?
Email supports attachments up to 25 MB (Gmail) / 20 MB (Outlook).
Will compression affect how the PDF looks when received?
Minor compression has no visible effect on standard documents.
Can I send a compressed PDF via Email on mobile?
Yes. Compress in your mobile browser, then share directly through the app.
Does compression affect digital signatures in the PDF?
Yes — if your PDF is signed, sign it after compressing.
What if the file is still too large?
Try splitting the PDF and sending pages in multiple messages, or upload to cloud storage and share a link.