Compress PDF — Honest, Private File Size Reduction
Shrink scanned and image-heavy PDFs, often by 50–90%, without uploading them. Text-only PDFs are already compact, and we'll tell you so.
Help shape Compress PDF — Honest, Private File Size Reduction
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Frequently Asked Questions
It depends on what's inside. Scanned documents and photo-heavy PDFs commonly shrink 50–90%. PDFs that are mostly text and vector graphics are already efficient and may shrink only a few percent — we show the exact before and after.
Browser compression works by re-encoding images. Text and fonts are already stored compactly, and rewriting them risks breaking the document. If we can't beat your original, you get the original back — never a bigger file.
No. Text and vector graphics are never touched — only photos and scans are re-encoded. Use Light for near-original image quality, or Strong for the smallest file.
No. Compression runs in your browser with pdf-lib. Your files never leave your device.
It converts the images inside the PDF to black and white, which saves extra space on scanned letters and forms. Coloured text and vector graphics keep their colours.