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Choose your quality level and download the compressed file instantly.
PDFs balloon in size for one main reason: images. A ten-page scan at high resolution can easily exceed 20 MB, while the same document at screen resolution reads identically on a monitor at a fraction of the size. Compression matters most when a portal caps uploads at 1 or 2 MB, or an email bounces because the attachment is too heavy.
This tool compresses by re-rendering: each page is redrawn at a lower resolution, which dramatically shrinks image-heavy documents — scans, photographed pages, brochures. The three presets mirror the classic print-industry settings: Screen (~72 DPI) for maximum reduction, eBook (~150 DPI) for comfortable on-screen reading, and Printer (~300 DPI) when the document may still be printed.
Because re-rendering converts page content into images, text in the output is no longer selectable — the trade-off that buys the size reduction. For documents that are mostly text and already small, compression gains will be modest; for scans and image-heavy files, savings of 70–90% are common. As always here, the entire process runs in your browser: confidential documents never leave your device.
Start with eBook — it reads clearly on screens and typically cuts image-heavy files dramatically. Use Screen when you must get under a strict upload cap and the document just needs to be readable. Use Printer when the PDF may be printed and you want to preserve fine detail at a smaller saving.
Compression works by re-rendering each page as an image at lower resolution, which is what makes big reductions possible. The visual content is identical but the text layer is gone. If you need selectable text at a smaller size, the original PDF may simply need its images optimized instead.
It depends what is inside. Scanned or image-heavy PDFs commonly shrink 70–90% on the Screen or eBook presets. PDFs that are mostly plain text are already efficient and may shrink only slightly — the before/after comparison tells you honestly whether it was worth it.
No. Your PDF is opened, re-rendered, and rebuilt entirely by your browser on your own device. That makes this tool suitable for contracts, medical records, and other files you would not hand to a random website.
Never. The tool produces a new, smaller PDF for you to download; the original on your device stays exactly as it was, so you can always go back to it.