Compress PDF
Reduce your PDF file size by adjusting quality.
Compress PDF online: reduce your file size
PDF files with high-resolution images can take up a lot of space. This tool lets you reduce the size by adjusting the quality of embedded images, ideal for emailing or uploading to platforms with size limits.
All processing happens in your browser using pdf-lib. Your files are never sent to any server, ensuring total privacy.
Frequently asked questions
How does PDF compression work?
The tool reduces the quality of images within the PDF to decrease the file size. You can adjust the compression level with the slider.
Is quality lost when compressing?
Yes, reducing the size means some image quality is lost. A 50% level offers a good balance between size and quality.
How much can the size be reduced?
It depends on the PDF content. Files with many images can be reduced by up to 80%. Text-only PDFs don't change significantly.
Is it safe to compress my PDFs here?
Yes, all processing happens in your browser. Your files are never uploaded to any server.
Is there a size limit?
There's no strict limit, but very large files may take longer to process depending on your device.