Compress PDF
Reduce PDF file size online for free. Choose a quality level and compress scanned or image-heavy PDFs privately in your browser.
How to use Compress PDF
- Choose a PDF file.
- Pick a compression level — stronger means smaller but softer images.
- Press Compress and download the smaller file.
Frequently asked questions
Will text stay selectable?
Strong compression turns each page into an image, so text is no longer selectable. Use “Light” to keep the original file if it is already small.
Which PDFs shrink the most?
Scanned documents and PDFs with large photos usually shrink the most — often 50–90%.
Is Compress PDF free?
Yes. Compress PDF is completely free, with no sign-up, no watermark and no usage limits.
Is my data uploaded to a server?
No. Compress PDF runs entirely in your browser. Your files and text never leave your device.
Does it work offline?
Yes. After Red Cat Tools has loaded once, this tool keeps working without an internet connection. You can also install Red Cat Tools as an app.
Related tools
All PDF toolsMerge PDF
Combine several PDFs into one file, in any order.
Compress Image
Make JPG, PNG and WebP files smaller in bulk.
PDF to JPG
Turn every PDF page into a JPG or PNG image.
Split PDF
Extract page ranges or split every page into its own PDF.
Organize PDF Pages
Reorder, rotate and delete pages visually.
JPG to PDF
Combine photos and images into a single PDF.