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PDF Tools

Compress PDF

Reduce PDF file size for email and uploads.

  • Free
  • No sign-up
  • Files stay on your device

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What does Compress PDF do?

Compress PDF rebuilds your PDF in a more compact structure so it’s easier to email or upload to forms with a size limit.

What you can use

One PDF file.

How to use Compress PDF

  1. Step 1

    Choose your PDF.

  2. Step 2

    Press Compress.

  3. Step 3

    Check the before → after size and download the result.

Good to know

  • PDFs that are mostly scanned photos shrink the most with the PDF option in File Compressors, which lets you choose a quality level.
  • Text-only PDFs are usually small already, so the saving may be modest.

Your privacy

Your file is opened and processed by your own browser — it is never uploaded. That also means big files use your device’s memory, so very large files can be slow on older phones.

Related tools

All PDF Tools
Merge PDFCombine several PDF files into one document — in your browser, nothing is uploaded.Split PDFSplit a PDF into separate files by page range, e.g. 1-3, 4-6.PDF to JPGTurn every page of a PDF into a JPG image.JPG to PDFPut one or more JPG/PNG images into a single PDF.PDF to WordPull the text out of a PDF so you can edit it (downloads as a .txt file).Word to PDFConvert a Word document (.docx) into a PDF.

Frequently asked questions

Is Compress PDF free?

Yes. Compress PDF is completely free, with no sign-up, no watermark and no daily limit.

Is it safe to use with contracts or ID documents?

Yes. Your PDF is opened and processed by your browser on your own device and is never uploaded, so nobody else sees it. Close the tab when you’re done and nothing is left behind.

Is there a limit on file size or number of pages?

There is no fixed limit. Because the work happens on your device, files of a few hundred pages are fine on a computer; on an older phone, very large PDFs may be slow or run out of memory.

Does it work on my phone?

Yes. It works in Chrome, Safari and other modern browsers on Android and iPhone — pick files from your gallery or Files app. Large videos and long PDFs are faster on a computer.