Step-by-step

1. 1Click "Select PDF file" or drag and drop your PDF onto the upload area.
2. 2Choose a compression level — Balanced works well for most files.
3. 3Click "Compress PDF", then download your smaller file.

What does compression do?

• Downsamples embedded images to reduce their resolution and file size.
• Removes redundant internal data and optimises the PDF structure.
• Small preset gives the biggest reduction; High preset preserves print quality.

Free PDF compression online

• No signup or account required.
• Works on any device — Windows, Mac, iPhone, or Android.
• Compress as many PDFs as you need, completely free.