UnpassHow to Reduce PDF File Size for Email
Open the Compress PDF tool →Most email services limit attachments — Gmail allows 25 MB, Outlook 20 MB, and many company mailboxes far less. A scanned PDF can easily be bigger than that and bounce back. Here is how to shrink it so it sends.
How to compress a PDF for email
- Open the Compress PDF tool — No sign-up or install.
- Upload your PDF — Pick the file from your device.
- Choose a level — "Recommended" gives the best size-to-quality balance.
- Download & attach — Attach the smaller file to your email.
💡 If it's still too big after compressing, split the PDF and send it in two emails, or upload it to a drive and share the link.
Why PDFs get so large
Scanned pages and photo-heavy PDFs store each page as a high-resolution image. Compression re-saves those images smaller, often cutting the file 50–80% while keeping it readable.
Ready? Use the Compress PDF tool — free, and your file never leaves your device.
FAQ
What is the email attachment size limit?
Gmail allows 25 MB, Outlook about 20 MB; many work mailboxes allow less.
Will compressing reduce quality?
The Recommended level keeps text clear while cutting size a lot.
Is my file uploaded?
No — it's compressed on your device.
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