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Compress PDF

Reduce PDF size by rasterizing pages.

How this PDF compression works

Choose a PDF, then select render scale and JPEG quality before downloading. A lower scale creates fewer pixels per page; lower JPEG quality saves more space but can make small text and diagrams harder to read. Start with the preset values, then compare the downloaded copy with the original.

When is it useful?

A scanned document with large page images may become smaller. A PDF made mostly of selectable text, drawings or already compressed images can become larger. For example, a sharp, text-based one-page form can lose clarity when turned into an image.

Keep your original PDF. This process converts every page to an image. Selectable text, search, links, forms and accessibility structure are lost in the output. Open the downloaded file and check its size, page count and readability before sharing it.

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Common questions

Will compression always make the PDF smaller?

No. The result depends on what the file contains; PDFs that are already optimized may change very little.

Should I inspect the downloaded PDF?

Yes. Open the output and check page quality and file size before replacing or sending the original.

What compression changes

Compressing a scanned PDF at the default 0.68 JPEG quality and 1× render scale usually shrinks it noticeably when the original pages are high-resolution scans or photos, though the exact result depends on what is on each page. Because compression rasterizes every page, the output loses selectable text, links, form fields and any accessibility structure the original had — compare the downloaded file against your original before replacing it.