Compress PDF

Upload a PDF, pick a compression level, and download a smaller version — works best on scanned or image-heavy PDFs.

Upload & compression level
📦
Click to choose a PDF, or drag & drop
Max 25MB · One file at a time
Compression result
Upload a PDF to get started.

Compress PDF online free — reduce file size for email and uploads

Large PDFs break email gateways, fail job-portal uploads, and frustrate clients on slow connections. This free PDF compressor shrinks file size in your browser so you can share documents without installing desktop software or creating an account.

Compression works best on files with images or scanned pages. Pure text PDFs may shrink less, which is normal. Always open the result once before you send it — if charts look too soft, use a milder setting and export again.

How to compress a PDF (step by step)

  1. Select or drag your PDF into the tool
  2. Choose a compression level that balances size and quality
  3. Run compression and wait for processing to finish
  4. Download the smaller PDF and compare size to the original
  5. Spot-check important pages (scans, photos, fine print)

Why PDF size matters

Email systems often cap attachments around 10–25 MB. University forms, HR portals, and client data rooms reject oversized uploads without a clear explanation. Shrinking a scan or pitch deck by 40–70% can be the difference between a failed send and a completed application.

Tips for better results

Frequently asked questions

Is PDF compression free?

Yes. No signup is required to compress and download.

Will quality drop?

Some trade-off is expected at stronger settings, especially for photos. Start milder when the document must stay crisp for print.

Is my PDF uploaded and stored permanently?

This tool is built for in-browser use so your document is not turned into a permanent cloud file on our side. See the Privacy Policy for site-wide details.

Which PDFs shrink the most?

Image-heavy PDFs and scans usually shrink more than pure text PDFs.

Can I compress password-protected PDFs?

Protected files may need to be unlocked in another tool first. Always follow the document owner’s rules.

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