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Compress PDF

Reduce the size of image-heavy or scanned PDFs with a quality control that runs in your browser. No registration is required.

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How to use Compress PDF

  1. Choose the PDF you want to reduce.
  2. Move the image-quality slider; start near 72% for a balanced result.
  3. Select Compress PDF and wait while each page is rendered.
  4. Compare compressed.pdf with the original before deleting or sharing anything.

What the tool creates

Compression renders each page and rebuilds it as an optimized JPEG image inside a new PDF. Lower quality values usually reduce size more, while higher values retain more visual detail.

The output is compressed.pdf. Because pages are rasterized, selectable text, links, forms, annotations and vector details may no longer behave like the original.

Common uses

  • Reducing scanned documents before email
  • Making photo-based PDFs easier to upload
  • Creating a lighter reading copy for mobile devices

Important limits

  • Text and links can become part of page images and stop being selectable.
  • Small text or detailed drawings may look softer at low quality settings.
  • Already optimized PDFs may shrink very little or occasionally become larger.

Privacy note: Supported processing runs in this browser tab. Do not process files you are not authorized to handle, and keep an original backup.

Compress PDF questions

How much smaller will my PDF become?

The result depends on page count, image detail and the selected quality. Scanned documents usually shrink more than text-only PDFs.

Will text remain searchable?

Not necessarily. This compression method rasterizes pages, so searchable text may be lost.

Which quality should I choose?

Try 70–80% for general documents and a higher value for small text or diagrams.

Why can the output be larger?

If the original already uses efficient compression, rebuilding every page as an image can add data.

Does the tool upload my PDF?

The rendering and rebuilding process runs in the browser for supported files.