Choose a PDF and a compression mode. Everything runs in your browser — your file is never uploaded, and we always show you the honest before/after size.
Make a PDF smaller — lossless optimize or strong image-based compression.
100% free · No sign-up · No daily limits · No watermarks · Processed in your browser — files never leave your device
Compress PDF: Choose a PDF and a mode: Optimize re-saves it losslessly with object streams; Strong re-renders every page as a JPEG image at the chosen quality and rebuilds the PDF.
Shrink a scanned contract with Strong mode before emailing it.
Choose a PDF and a mode: Optimize re-saves it losslessly with object streams; Strong re-renders every page as a JPEG image at the chosen quality and rebuilds the PDF.
Optimize re-saves the PDF losslessly with object streams, so page content and text stay exactly as they are. Strong re-renders every page as a JPEG image at the quality you choose and rebuilds the PDF, which gives the biggest savings — especially for scanned or image-heavy files.
That is normal for Optimize: because it is lossless, savings are usually modest, and it can occasionally produce a slightly larger file. Use Strong mode when you need a much smaller result.
No. Strong mode converts text into images, so the text in the compressed PDF is no longer selectable or searchable, and fine detail can soften. Use Optimize if you need your text to stay real text.
No. Compression runs in your browser — your file is never uploaded — and the tool shows you the honest before-and-after size once it finishes.
What is missing, broken, or could be better on this tool? Tell us — we read every suggestion.
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