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Compress PDF

Reduce PDF file size with a quality-preserving recommended mode or stronger compression for image-heavy documents.

Secure processing serviceProcessing requirements depend on this tool.
Compression mode

Your file is sent securely to OneTools for compression.

Continue with

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Merge PDFCombine multiple PDF files in the exact order you choose without uploading them to a server.Split PDFExtract selected pages into one document or separate every page into individual PDF files.Edit PDFAdd text, images, signatures, highlights, drawings and shapes to your PDF directly in your browser.

How it works

  1. 1Upload one PDFChoose a PDF up to 100 MB from your device.
  2. 2Choose compressionUse Recommended to preserve quality or Smaller File for stronger image compression.
  3. 3Download the resultReview the original and compressed sizes, then download the compressed PDF.

Why use OneTools

  • Two practical modesChoose between quality-preserving optimization and stronger image compression.
  • Clear size summarySee original size, compressed size and space saved when compression applies.
  • Secure processingThe protected server connection processes the file without exposing the API key.

Frequently asked questions

Which compression mode should I choose?

Start with Recommended. Use Smaller File when reducing size matters more than preserving image detail.

What if my PDF is already optimized?

The result explains when no smaller version can be created without increasing file size.

Is the compression API key sent to my browser?

No. The browser sends the PDF to OneTools, and the protected backend request happens server-to-server.

What is the maximum file size?

You can submit one PDF up to 100 MB.

Popular use cases

  • Reduce a PDF before emailing it
  • Make reports easier to share
  • Shrink image-heavy scanned documents
  • Prepare a PDF for an upload limit

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Merge PDFCombine multiple PDF files in the exact order you choose without uploading them to a server.Split PDFExtract selected pages into one document or separate every page into individual PDF files.Delete PDF PagesSelect unwanted pages visually and create a new PDF containing everything else.Extract PDF PagesChoose exactly which PDF pages to save in a new document while preserving their original order.Reorder PDF PagesDrag page previews into the order you want and save a rearranged PDF without uploading it.PDF to JPGRender all or selected PDF pages as individual JPG images directly in your browser.PDF to PNGRender all or selected PDF pages as lossless PNG images directly in your browser.