Step-by-step PDF guide
How to Compress a PDF for Email
Email systems and online forms often reject large attachments. A compressed copy can make a PDF easier to send while leaving the original document unchanged.
Open Compress PDFCreate a smaller PDF copy
Open the Compress PDF tool, select the document, and choose a compression level. Download the result and compare its size with the original before attaching it to an email.
- Keep the original PDF.
- Use moderate compression for text and forms.
- Check small print and signatures at 100% zoom.
Balance file size and readability
Documents with scanned photos usually offer the largest size reduction, but stronger compression may soften fine details. A mostly text-based PDF may already be efficient. Choose the smallest result that still keeps names, dates, numbers, stamps, and signatures easy to read.
- Review every image-heavy page.
- Confirm the recipient's upload limit.
- Avoid repeatedly compressing the same copy.
Before sending the attachment
Open the downloaded file in a normal PDF reader. Confirm that every page is present, the page order is correct, and important text remains legible. If the document contains private information, verify the recipient and consider password protection when appropriate.
Common questions
Will compression change the original PDF?
No. PDF Mixo creates a new compressed copy and leaves the original file unchanged.
Why is my compressed PDF still large?
A PDF that is already optimized or contains many detailed images may have less removable data.
Can I compress a PDF without uploading it?
The standard PDF Mixo compression workflow runs locally in your browser.
Ready to work on your document?
Open the matching PDF Mixo tool and keep the original file as a backup.
Open Compress PDF