How to Compress a PDF for Email
Reduce a PDF for email attachments while keeping text and scanned pages readable enough for the recipient.
Start with the actual attachment limit
Do not compress more aggressively than necessary. First check the file's current size and the practical limit of the email or receiving system. If a 12 MB PDF only needs to fall below 10 MB, a moderate setting is usually more appropriate than a maximum-compression preset.
Remember that email systems can add encoding overhead, so leaving some margin below the published attachment limit is safer than targeting the exact maximum.
Image-heavy PDFs shrink the most
Scanned documents often contain a full-page image for every page, so reducing image resolution or JPEG quality can produce a large size reduction. PDFs made mostly from optimized digital text may already be compact and can show much smaller gains.
Compression that rebuilds pages as images can also remove selectable text, links, form fields or accessibility structure. That trade-off is acceptable for some scan-sharing tasks but not for every document.
Review before sending
Open the compressed copy at normal reading size and inspect small text, signatures, stamps, QR codes and fine linework. These details reveal compression damage faster than large headings do.
Keep the original document. A smaller sharing copy should not automatically replace the higher-quality source used for records or future editing.
Use the related Pageivo tool
Make large PDF files easier to share. The operation runs in your browser and does not require an account.
This guide provides general technical and workflow information. For regulated records, legal filings, security-sensitive data or organizational compliance, follow the rules that apply to your specific situation.