Compress a PDF file online for free

Reduce your PDF's file size directly in your browser with adjustable compression levels. Free, no login, no watermark.

No login required No watermark Runs in your browser
1

Upload your file

Drop a file from your device, nothing to install.

2

Run Compress PDF Online

Shrink a PDF's file size online.

3

Download instantly

Save the result, or store it in your NativeDoc cloud.

Free to use, with unlimited access on Pro from $5/mo.

Why use NativeDoc for this?

  • Pick a compression level to balance size against quality
  • No software install, works from any browser
  • Ideal for getting under email or upload size limits
  • Your file is processed on your device, not a remote server

Frequently asked questions

What is the fastest way to shrink a PDF for email?+

Use balanced compression, it usually cuts file size significantly while keeping the document easy to read.

Can I compress a PDF that is already small?+

Yes, though the size reduction will be smaller since there is less to trim compared to an image-heavy file.

Does this work on PDFs with lots of scanned pages?+

Yes. Scanned, image-based PDFs typically see the largest size reduction of any document type.

Is Compress PDF Online free?+

Yes. Compress PDF Online is free to use with a light hourly limit. Upgrade to Pro for unlimited use, larger files and batch processing.

Do I need to create an account?+

No. You can use the tool right away without signing up. An account is only needed if you want to save files to your NativeDoc cloud.

Are my files safe?+

Yes. Files are processed securely and are never shared. Most tools run right in your browser, so your document doesn't leave your device unless you choose to save it.

Will there be a watermark?+

No. NativeDoc never adds a watermark to your files, on the free tier or Pro.

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