Will compressing reduce quality?

Lower quality presets shrink more by re-encoding pages as images. High quality keeps more detail; low quality produces the smallest files.

Are my PDFs uploaded?

No. This compress PDF tool processes files locally. Documents never leave your device.

Already highly compressed PDFs or text-heavy files may not shrink much, and rasterizing can occasionally increase size. Try a lower quality preset.

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Compression quality

High keeps more detail. Low makes the smallest file.

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Pages are re-encoded to reduce size. Scanned or image-heavy PDFs usually shrink the most.

How do I compress a PDF?

Add a PDF, pick a quality preset, then download. Everything stays in your browser.

Are my files uploaded?

No. Compress PDF runs locally. Documents never leave your device.

Will text stay selectable?

Compressed output is image-based for size reduction, so text may no longer be selectable. Keep the original if you need a searchable PDF.