Private
Your PDF is optimized locally in your browser. We never see or store your file.
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Compress PDF
Reduce PDF file size with lossless local optimization in your browser.
Free to use No watermark Secure & private
1. Upload your PDF file
Drag & drop a PDF file here
orYour PDF stays private on your device.
We never upload or store it.
2. Optimize without quality loss
Upload one PDF to optimize it locally without losing quality.
Lossless
Optimizes PDF structure and data streams without lowering image quality.
Free
100% free to use with no watermark, no account and no hidden fees.
Works in Browser
Compress PDF files on desktop, tablet or mobile with no installation.
How to compress a PDF
1
Upload a PDF
Choose one PDF file from your device. It remains private.
2
Optimize locally
We optimize its PDF structure and data streams without reducing quality.
3
Download
Download the smaller PDF when lossless optimization saves space.
Frequently Asked Questions
Will lossless PDF compression reduce quality?
No. This first compression mode optimizes PDF structure and data streams without converting pages or lowering image quality.
Why did my PDF not become smaller?
Some PDFs are already optimized, especially files that were previously compressed or contain efficiently encoded images. We do not create a larger replacement file.
Are my PDF files uploaded to a server?
No. Compression happens locally in your browser. Your PDF is never uploaded to or stored on our servers.
Will text, links and vector graphics be preserved?
Yes. Lossless optimization keeps the original page content, searchable text, links and vector graphics intact.
Can I compress a password-protected PDF?
Unlock a PDF you are authorized to access first, then compress the unlocked copy.