PDF Compressor

Start with Medium — it produces the best balance between file size and quality for most PDFs. For sending via email or messaging apps where the smallest file is important, choose Low. If the PDF contains photos you need to remain sharp (product catalogue, portfolio), try High.

This tool works by rasterizing each page to a JPEG image. If your PDF is mostly text or already-compressed images, the rasterized result can be larger than the original vector content. Try a lower preset first. If size still doesn't improve, the PDF may already be well-optimized and a different compression approach (such as an offline tool like Ghostscript) may work better.

No. The process converts each page to a JPEG image, so the output is an image-only PDF. Text will not be selectable, copyable, or searchable. If you need to preserve selectable text, use a lossless tool such as Ghostscript or Adobe Acrobat's PDF Optimizer.

Compression speed depends on your device and the number of pages. A typical 20-page PDF takes 5–15 seconds on a modern computer. Large PDFs (100+ pages) at High or Maximum quality may take a minute or more because each page must be decoded and re-encoded individually.

There is no hard limit built into the tool. The practical limit is your browser's available memory. Very large PDFs (hundreds of pages at high resolution) may cause the tab to slow down or run out of memory. For very large files, try a lower preset or split the PDF first.