How to use Compress PDF
- Choose a PDF from your device. Your files are processed locally in your browser and are not uploaded to our servers.
- Choose your PDF and select Compress PDF.
- Compare the original and finished sizes, then download the smaller copy.
A closer look
Lossless compression repacks the information inside a PDF without deliberately reducing image quality. It works best on documents with inefficient internal storage. Scanned photos often already use compressed images, so their files may not shrink much or at all.
A practical example
Try a report exported by an older document application, then compare the original and output sizes. Keep the original if repacking does not reduce its size.
A useful tip
If no space is saved, we keep your original bytes. You do not need to download a larger version.
Good questions. Simple answers.
Will the pictures become blurry?
No image downsampling is performed. This is lossless optimization, not a low-quality scan conversion.
Explore all pdf tools for related tasks and category-specific guidance, or read how Toolzafi handles your data.