Compress PDF

Reduce your PDF size without visible quality loss. Ideal for emailing.

100% free
No sign-up
Files auto-deleted
Secure processing

How to compress pdf

  1. 1

    Upload

    Upload your PDF file into the drop area (or drag and drop it).

  2. 2

    Configure

    Reduce your PDF size without visible quality loss. Ideal for emailing.

  3. 3

    Download

    Download the resulting document in one click — your files are deleted automatically after processing.

Frequently asked questions

How do I reduce the size of a PDF file?

Upload your PDF and choose a compression level. Our tool optimises images and the document structure to reduce its weight while preserving readability.

Does compression degrade the quality of my PDF?

Compression is optimised to remain visually imperceptible in most cases. You can choose a stronger level if size matters more than quality.

Does compression reduce the quality of my PDF?

Compression mainly optimises embedded images, which can slightly soften them. Text and vector elements stay sharp and perfectly readable.

What happens if my PDF is already compressed?

A PDF that is already optimised or made mostly of text will shrink only a little, since there is little data left to reduce. The savings are much larger for files full of images or scanned photos.

Is Compresser PDF really free?

Yes, this tool is 100% free with no usage limits. No sign-up, no credit card and no watermark added to your documents.

Are my PDF files safe?

Yes. Your files are processed securely and automatically deleted from our servers after processing. Nobody has access to them.

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