Compress PDF
Optimize PDF structure to try to reduce file size without uploading the document.
Drop PDF files here
or click to browse your files
Max 100 MB per file
Compress and optimize a PDF in your browser
This tool rebuilds the PDF with a compact object-stream structure to reduce unnecessary internal overhead where possible. It is best suited to PDFs that contain inefficient object structures or were produced by software that did not optimize the file well. It does not aggressively downsample photographs or deliberately reduce image quality, so image-heavy PDFs that are already compressed may shrink only a little, remain about the same size, or occasionally become larger. Processing is local in your browser and the original file is not uploaded to a YourPDFs processing server.
How to use this tool
- Choose an unprotected PDF file.
- Select Optimize PDF and let the browser rebuild the document structure.
- Compare the original and output sizes shown after processing.
Frequently asked questions
Will this reduce image quality?
This implementation does not deliberately downsample or recompress embedded images, so it is intended as structural optimization rather than lossy image compression.
Why did my PDF barely shrink?
Many PDFs are already compressed internally. If most of the file size comes from JPEG images or other already-compressed content, structural optimization may have little effect.
Are my PDF files uploaded?
No. The optimization operation runs in your browser and the PDF file is not sent to a YourPDFs processing server.
Can I optimize a password-protected PDF?
Not with this tool. Use an unprotected copy that you are authorized to process.
Is this the same as aggressive PDF compression?
No. This is primarily structural optimization. Services that promise very large reductions often achieve them by recompressing or downsampling images, which can lower visual quality. YourPDFs currently avoids that kind of lossy image processing here.
What should I do if the optimized file is larger?
Keep the original. Some PDFs are already efficiently encoded, and rebuilding them can add a small amount of overhead. The size comparison shown after processing lets you decide which copy to keep.