Compress PDF on Windows
Windows has no built-in PDF compressor — the usual advice is buying Acrobat or gambling on freeware. The browser route skips both: upload, compress (to an exact KB if needed), download. We compress toward your target at the best quality that fits, never make the file larger than the original, and always show the real final size — very image-heavy files may land slightly above tight targets.
- 1Upload
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Drag & drop your file here
or click to browse · Up to 15 MB
Select fileAccepted: PDF
Your files are processed temporarily and deleted automatically — there is no general cloud storage. File deletion.
How to compress pdf
Simple steps — no software to install.
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Open Compress PDF in your browser
Edge, Chrome, Firefox.
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Upload and compress
Optional exact KB target.
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Download the smaller file
Done — nothing was installed.
Why use our Compress PDF
Secure & private
Files are encrypted in transit and deleted automatically after processing.
Fast results
Optimized processing returns your file in seconds.
Free to start
Core tools are free with daily limits — no install required.
Works anywhere
Runs in your browser on any device, anywhere in the world.
The Windows software trap
Free PDF desktop tools for Windows are a minefield of bundled adware and upgrade nags, and Acrobat is a subscription for what is often a monthly task. Browser compression does the job with nothing installed and nothing to uninstall later.
Every Windows machine qualifies
Edge, Chrome or Firefox on Windows 10 or 11 — including locked-down office PCs where you cannot install software anyway. Server-side processing means the machine's specs never matter.
- Zero installs on Windows
- Works on locked-down office PCs
- Exact KB targets
- No Adobe subscription
- Free with fair daily limits