How to reduce a PDF file size for email
Mail servers bounce oversized attachments long before the recipient sees them. This is the order of operations that gets a PDF small enough to send.
Every step runs on your device — no upload, no account
Shrink my PDFStep by step
1. Know the limit you are aiming for
Gmail and Outlook both cap attachments at 25MB, and many university or HR portals cap far lower at 5MB or 2MB. Pick the target before you compress.
2. Compress the document
Drop the PDF into the compress tool and choose medium quality. Scans and image-heavy reports usually shrink dramatically at this setting.
3. Remove pages you are not sending
Cover sheets, blank pages and appendices add weight. Delete pages or split out the section the recipient actually asked for.
4. Send and verify
Attach the compressed copy and open it once from the sent message to confirm text and signatures are still clear.
Frequently asked questions
What is the maximum PDF size for email?
Gmail and Outlook allow attachments up to about 25MB, but the receiving mail server may reject anything above 10MB. Aiming for under 10MB is the safe choice.
How do I email a PDF that is too large?
Compress it first, then remove pages you do not need. If it still will not fit, split the document and send it in two messages.
Will the recipient notice the compression?
At medium quality most people cannot tell. Photographic detail softens slightly, while text and signatures stay sharp.
Is my document uploaded anywhere?
No. PDFFILZ processes the file inside your browser, so contracts, invoices and medical records never leave your computer.