PDF Harbor
document.pdf
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Compress a PDF without uploading it.

Make photos and scans lighter so the file is smaller, while text and drawings stay sharp.

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  • Keeps working if you go offline
  • Files live in this tab and are gone when you close it
  • Built on open engines: pdf.js, Tesseract and qpdf

Drop PDF or Word files here

Several PDFs are merged in the order you choose.

Or start with a tool

Organize

Convert

Sign and secure

How it works

  1. Open your PDF.
  2. Press Compress and choose the image quality.
  3. Check the new size and save.

Questions

Are my files uploaded anywhere?
No. PDF Harbor runs entirely in your browser. Your files are read and processed on your device and are never sent to a server — you can check it in the counter on the home page or with your browser’s network tools.
How much smaller will it get?
It depends on the content. PDFs with photos or scans often shrink a lot; text-only PDFs are already small.
Can I undo it?
Yes. If you don’t like the result, press Undo.

They will be merged in this order, or continue with just one.

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