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Compress a PDF — make the file smaller, no upload

Try reducing a scan or photo-heavy PDF by turning its pages into compressed pictures. The new copy loses searchable text, working links and form fields.

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Read this first. This turns every page into an image. It may make the file smaller, but can also make it larger. Text will no longer be selectable or searchable. Keep the original. Links, fillable forms and accessibility information may also be lost. Check what the recipient needs before sharing it.
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Image-based PDFs may shrink; text-heavy PDFs can grow. Compare the file size and page quality with the original before using the new copy.

How to use

  1. Open a PDF. Check the page count and keep the original, especially if it has searchable text or forms.
  2. Choose Resolution and Image quality. Try the starting settings, then lower them gradually if size matters more than fine detail.
  3. Compress PDF. The result downloads automatically, even if it is larger. Compare New size with the original size.
  4. Inspect the saved copy. Check small print, signatures and page count. Keep the version that meets the destination’s size limit while remaining readable.

Questions

Which PDFs are worth trying?

Scans and large photographs are good candidates. A short report made of text and vector graphics may already be compact; turning it into pictures can increase its size.

What will stop working?

The original text layer, links, form fields, bookmarks and accessibility structure are not carried into the rebuilt PDF. Text may still be visible, but this tool does not add OCR. Use another compression method if those features must survive.

Is there a setting that always makes a small, sharp PDF?

No. Fine print needs more resolution than a broad diagram, and a detailed page needs more space than a plain one. Open the downloaded file before sending it; a low-resolution preview is not enough to judge every page.

Is compression also redaction?

No. It makes pictures of the rendered pages and does not decide which information should be hidden. Use a proper redaction process for confidential content rather than treating compression as a privacy check.

Examples and checks

Try this for a scanned PDF that is too large to share. It rebuilds each page as an image, so choose another approach if you need selectable text, screen-reader structure or working form fields.

A scan and a text document behave differently

Input or situation
Compare a scanned page with a PDF exported from a word processor.
Result
The scan may shrink; the text PDF can become larger.

A picture of a text page can take more space than the original text. Compare the reported sizes and keep the original if it is smaller.

Before you use the result

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