This tries to slim your document down by re-encoding embedded images and dropping needless metadata. Browser-side PDF compression has genuine limits, so rather than overpromise, it shows the original and result sizes side by side and tells you when a file is already about as small as it'll get.
Your files are processed securely in your browser and are not uploaded to our servers.
Compress PDF works on your documents locally, so you get the result in seconds with no watermarks, no sign-up and no files leaving your device.
No. If a PDF is mostly text or already optimized, there may be little or nothing to remove, and we say so clearly.
Lower presets recompress images more aggressively, which can soften pictures. Text stays readable.
If it is mostly text or already optimized there may be little to remove; the tool tells you honestly when that happens.
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About browser-side PDF compression