Compress PDF

Reduce the file size of your PDF while maintaining quality. Choose from different compression levels.

How to Compress a PDF Online

  1. 1

    Upload your PDF

    Drag and drop your PDF file into the upload area, or click to browse and select it from your device.

  2. 2

    Choose compression level

    Select from three options: Maximum compression for the smallest file size, Recommended for a good balance, or Minimum compression to preserve the best quality.

  3. 3

    Click Compress PDF

    Hit the compress button and PDFWhisker will reduce your file size while maintaining your chosen quality level.

  4. 4

    Download your compressed file

    Download the smaller PDF. The original file and compressed version are automatically deleted from our servers within one hour.

Why Use PDFWhisker to Compress PDFs?

Large PDF files can be a problem when emailing documents, uploading to web portals, or sharing through messaging apps. PDFWhisker compresses your PDFs online for free, reducing file size without losing important content. Choose from three compression levels depending on whether you prioritize the smallest file size or the highest quality output. The tool is perfect for compressing PDFs for email attachments under the 25MB Gmail limit, reducing scanned documents for archiving, or shrinking presentations for faster sharing. No signup required — upload, compress, and download in seconds.

Frequently Asked Questions

How much can I reduce my PDF file size?

Compression results vary depending on the content. PDFs with many images typically see 50-80% size reduction with maximum compression. Text-heavy PDFs may see 10-30% reduction since text is already compact.

Will compressing a PDF reduce the quality?

The Minimum compression option preserves nearly all quality. Maximum compression reduces image resolution to achieve smaller sizes. Choose Recommended for a good balance between size and quality.

Can I compress a PDF to a specific size?

PDFWhisker doesn't target a specific file size, but you can try different compression levels to find one that meets your needs. Maximum compression produces the smallest files.

Can I compress a PDF for email?

Yes. Many users compress PDFs specifically to fit under email attachment limits like Gmail's 25MB cap. Use the Maximum or Recommended compression level to significantly reduce file size.