Common uses
- Rewrite PDFs with cleaner, more efficient internal structure.
- Reduce overhead in documents produced by less efficient generators.
- Optimize a private PDF without uploading it to an online server.
Compress PDF Files Online
Apply safe, lossless PDF structure optimization.
Processed locally. Never uploaded.
Drop a file here
PDF ยท Up to 100 MB each
Files never leave your device
How it works
Done in three quick steps
- 1
Choose a PDF file.
- 2
Run lossless PDF optimization.
- 3
Compare sizes and download the optimized document.
About this tool
What you can do with Compress PDF
The PDF compressor performs lossless structural optimization and writes efficient object streams. It does not rasterize pages or downscale embedded images, so text remains selectable and visual quality stays intact; already optimized PDFs may see little or no reduction.
Tips for better results
- Expect the largest gains on PDFs with redundant internal structure.
- Image-heavy files may require lossy image downscaling for major reductions, which this safe mode does not perform.
- Compare the output size before replacing the original file.
Good to know
Frequently asked questions
Clear answers about privacy, quality and how this tool works.