Email attachments
Most email services cap attachments at 10–25 MB. Compressing a large PDF before sending avoids bounce-backs and speeds up delivery.
Reduce PDF file size by re-encoding images inside the PDF. Works entirely in your browser.
Select a PDF file to compress
PDFs can grow surprisingly large for several reasons. Documents that contain embedded photographs, scanned pages or high-resolution illustrations carry significant image data inside the file. Fonts, metadata, document revision history and embedded previews add further overhead. The result is a file that may be too large for common email attachment limits, which typically sit between 10 and 25 MB depending on the service. Many company email servers and webmail providers silently block or bounce messages that exceed their limit, meaning your attachment may never arrive. Government portals, HR systems and application forms often impose strict upload caps as well. Compressing a PDF before sharing addresses all of these friction points in one step. The compression process works by resampling the embedded images at a lower resolution and stripping out unnecessary metadata and internal overhead. The text content of the PDF is not affected — paragraphs, headings and tables remain fully sharp and readable. For image-heavy documents such as scanned contracts or photo-rich brochures, file size reductions of 40 to 80 percent are common. For text-only documents the savings will be more modest since those files are already compact by nature. Choose medium compression for everyday use and high compression when the smallest possible file is the priority.
Most email services cap attachments at 10–25 MB. Compressing a large PDF before sending avoids bounce-backs and speeds up delivery.
Many government, HR and educational portals have strict upload size limits. Compressing your PDF ensures it passes through without errors.
Smaller PDFs use less storage quota and download faster when shared via Google Drive, Dropbox or direct links.
PDFs heavy with embedded images can often be reduced by 40–80%. Text-only PDFs compress less because they are already efficient.
Text remains fully readable after compression. Image quality inside the PDF may be slightly reduced if the file contained high-resolution embedded photos.
Yes. Compressed PDFs are fully standard PDF files and can be opened, read and printed in any PDF viewer.