How to use the Compress PDF for Email
- Drop your PDF — Strong compression is already selected.
- Optionally convert images to grayscale for an even smaller file.
- Compress and download.
Attachment limits
Most email services cap attachments at about 20–25 MB, and many company mail servers allow less. Scans and photo-heavy PDFs shrink the most; text-only PDFs are already small.
Still too big?
- Turn on grayscale for scanned documents.
- Remove pages you don’t need with Remove Pages from PDF.
- Split it into parts with Split PDF.
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Tools that pair well with the Compress PDF for Email
- Compress PDF — Shrink PDFs for email, upload forms and websites.
- Merge PDF — Combine several PDF files into one document.
- PNG to PDF — Turn PNG images into a PDF — one per page or many combined into a single document.
- ID Card Scanner — Photograph or upload the front and back of an ID card, driver’s license, residence permit or bank card, drag the corners to straighten each side, and get both on one A4 or Letter page at real size — ready to print or save as a PDF.
Frequently asked questions
How much smaller will my PDF get?
It depends on the content. Scanned and photo-heavy PDFs often shrink by more than half; text-only PDFs change little.
Will the text stay sharp?
Yes. Compression mainly affects images inside the PDF.
Is my PDF uploaded?
No. It is compressed in your browser.
Can I install Compress PDF for Email as a web app and use it offline?
Yes. Compress PDF for Email is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.