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Compress PDF

Reduce PDF file size with adjustable compression while preserving readable text, page layout, and practical visual quality.

Choose PDFs to compress

Choose one or more PDFs, or drop them here.

Your PDFs are processed locally in your browser and are not uploaded to a server.

Large or numerous PDFs may be limited by the available device memory.

How to use Compress PDF

  1. 1

    Add the PDF you want to compress by clicking Choose File or dragging it into the upload area.

  2. 2

    Review the original file size and page count, then choose Low, Balanced, or Strong compression.

  3. 3

    If needed, open the advanced settings to adjust image quality and maximum image resolution more precisely.

  4. 4

    Enter an output file name and click Compress PDF to begin processing the document.

  5. 5

    Compare the original and compressed sizes, then download the optimized PDF or try another compression setting.

Frequently asked questions

About Compress PDF

Compress PDF reduces the storage space required by a PDF while keeping its pages readable and usable. It is especially effective for documents containing large photographs, scanned pages, presentation graphics, or other high-resolution images that make files difficult to email, upload, archive, or share.

Three compression levels provide a quick choice between visual quality and file size. Low compression retains more image detail, Balanced offers a practical reduction for most documents, and Strong produces smaller files by applying greater image optimization. Advanced controls allow more precise adjustment of image quality and maximum resolution when a preset does not match the intended use.

The tool optimizes embedded images and suitable PDF data without rasterizing the complete document, so text-based content remains searchable and the page layout is preserved. Processing takes place locally in your browser. After compression, you can compare the original and optimized sizes, review the percentage saved, and download the result. Some already optimized PDFs may show only a small reduction.