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Compress PDF

Reduce PDF file size for email and upload limits without changing page order or creating a new page selection.

Next step
Combine multiple PDFs into one.Merge PDF

How to reduce PDF file size When a PDF is already correct but too large to send, compression is often the last step before upload. This tool focuses on file size reduction rather than page editing, merging, or splitting. It does a - effort PDF rewrite in your browser without installing anything. When possible, files stay on your device. Useful when: emailing PDFs, submitting forms with limits, or saving storage space

PDF ToolsBrowser-basedOpen full guide

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Help and details

How to use

  1. Upload your PDF file by clicking or dragging
  2. Select compression level (low, medium, or high)
  3. Click 'Compress' to run the browser - side rewrite
  4. Download the smaller PDF if a reduction is found

Privacy and processing

Compression happens entirely in your browser. Your PDF is not uploaded to our servers.

Frequently Asked Questions

How much can I reduce my PDF size?
Results vary a lot by document. Browser - based PDF rewrites can help with some files, but scanned or image - heavy PDFs may shrink only a little.
Will compression reduce the quality?
This tool does not rasterize pages. It rewrites the PDF structure and keeps the smaller browser - generated result when possible.
Can I compress to a specific file size?
No. This tool does not offer a target - size guarantee. If you need a strict upload limit, split the PDF or compress the source images first.
Are my files safe and private?
Yes. Compression happens entirely in your browser. Your PDF is not uploaded to our servers.
What's the maximum file size I can compress?
The browser tool accepts PDFs up to 50MB. Very large files may still be slow depending on your device, so splitting first can help.
Is the compressed PDF watermarked?
No, we never add watermarks. Your compressed PDF looks exactly like the original, just smaller in file size.
Can I compress password - protected PDFs?
Not directly in this browser workflow. Unlock the PDF first, then compress the unlocked copy.
Does this work on mobile devices?
Yes, our PDF compressor works on all devices including iPhones, Android phones, and tablets. No app required.