How much smaller will my PDF get?

It depends entirely on what is inside it. Scanned documents and photo-heavy files typically drop by 50-80% on the Strong setting. A text-only or vector PDF contains no images to re-encode and comes out the same size — the tool says so plainly instead of reporting a fake saving.

What do the three settings actually do?

Strong downsizes images to a maximum of 1600 pixels on the long edge and re-encodes at quality 50; Balanced uses 2200 pixels at quality 68; Light keeps up to 3000 pixels at quality 82. Images are never enlarged, so a small image is left alone. Balanced is the right choice for most documents.

Will the pages look different afterwards?

The layout, text and page count are untouched. Images get slightly softer, which is invisible on screen at normal zoom and usually invisible in print too, because the display size of an image is set by the page layout rather than by its pixel count. If you need pixel-perfect archives, use Light or keep the original.

Is there a file size limit?

100MB per file. Very large files need a lot of device memory to decode and re-encode, so we block anything above that rather than let your browser tab crash. On a phone, files under about 30MB are comfortable.

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Compress PDF

Reduce your PDF file size by re-compressing the images inside it. Everything happens in your browser.

Choose your PDF

Select file or drag & drop it here · up to 100MB

Compression strength

Strong downsizes images to 1600px and re-encodes at lower quality; Light keeps up to 3000px. Images are never enlarged.

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