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Advanced PDF Compressor
Choose a target size and let the Auto mode do the work — or fine-tune DPI, scale and JPEG quality in Advanced mode. Everything runs in your browser; files never leave your device.
Best results for scanned or image-heavy PDFs. Large files may take a while on mobile.
Note: Auto mode will try multiple passes to reach the target. It may trade image quality and resolution to fit within limits.
How Auto mode works
Auto mode attempts multiple compression passes — decreasing resolution and JPEG quality — until the output file meets your target or the attempts limit is reached.
If you need lossless or 100% fidelity for complex PDF layouts, use a desktop tool. This in-browser compressor is ideal for scanned/image PDFs and quick sharing.