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Compress PDF
Optimize images and shrink PDF document file sizes locally inside your browser.
100% Offline & Private
Select PDF document
Drag & drop or select a PDF file to compress
Document Selected
document.pdf (0 KB)
Ready to Compress
Select your compression ratio on the right and click "Start Compression".
Original Size
0 KB
Compressed
0 KB
Saved 0% of original file size!
Compression Settings
65%
Lower quality leads to smaller file sizes but may introduce pixelation on embedded images.
Compressing page 1...
Frequently Asked Questions
Quick direct-answer guides about using this utility tool locally and securely.
How does client-side PDF compression work?
Our tool loads the PDF pages, renders them onto canvas elements at a slightly reduced scale, and compresses the images to standard JPEG buffers at a chosen quality factor. This significantly reduces the document size while keeping the visual layout intact.
Will text remain selectable after compression?
Since the local compression method flattens the pages to optimized images to guarantee maximum size reduction, the output PDF will be an image-only document. If you require selectable text, we recommend keeping a backup of the original.
What is the best setting for document compression?
For standard office documents, a Resolution scale of 1.2x and Image quality of 60% to 70% offers an optimal balance, reducing file size by 70%+ while keeping text and diagrams crisp.