Free pdf tool
Compress PDF
Reduce PDF output size using browser-based PDF serialization and object-stream optimization.
Browser-based processing is used where supported. Review each tool's privacy notes before entering sensitive information.
About Compress PDF
Make some PDF files smaller by rewriting them with PDF object streams. Results vary depending on how the original PDF was created.
How to use it
- Upload your PDF.
- Click Compress PDF.
- Compare the original and output sizes.
- Download the optimized PDF if the result is useful.
Key Features
- ✓ No server upload
- ✓ Shows original and output size
- ✓ Works in the browser
- ✓ No account required
Frequently Asked Questions
Will every PDF become much smaller?
No. Compression depends on the PDF structure. This tool optimizes PDF serialization rather than performing aggressive image recompression.
Is the original file changed?
No. A new output PDF is created for download.
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