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Compress PDF Online — Compare File Sizes

Try a smaller PDF for an upload or email attachment. Choose optimization or image-based compression, then compare the result with your original.

Getting your tool ready…Open the full workspace

Open this tool in a separate tab · Download your result before closing the page.

How to use this tool

  1. Choose your fileChoose a PDF within the displayed file and page limits.
  2. Set up your taskSelect the compression method and, for image-based compression, the quality.
  3. Review & downloadCreate and review the result, compare the file size, and download.

Limits and what to review

Image-based compression removes selectable text, links, and interactive fields; it requires acknowledgement before running. Review small text and fine detail. A PDF that is already optimized may not become smaller.

Frequently asked questions

What if the compressed result is larger?

The tool explains that the chosen setting did not reduce the size and offers your original PDF for download instead.

Will text remain selectable?

The optimization method does not rebuild page images. Image-based compression does rebuild pages as images and removes selectable text.

Are my files uploaded to a server?

Files are processed within your browser session. Download results before closing the page; there is no cloud document history.

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