Compress PDF
Shrink a heavy PDF so it fits email or upload limits.
Processed in your browser, files never leave your device
Choose a file
or drag and drop here
Practical guide
How to use Compress PDF
PDF compression can help when a document is too large to email, upload or store conveniently. The amount of reduction depends on how the original PDF was created and whether it already contains compressed images.
Steps to follow
- Choose the PDF you want to reduce in size.
- Select a compression level or enter a target size if that option is available.
- Start compression and wait for the new file to be created.
- Compare the original and compressed file sizes, then open the result to check image clarity and text readability.
Tips for a better result
- Use lighter compression for documents containing small text, diagrams or detailed photographs.
- Try stronger compression when a website has a strict upload limit and the visual result remains acceptable.
- Keep the original until you have confirmed that the compressed copy is suitable.
What to check before using the file
A target size cannot be guaranteed for every PDF. Some files are already highly compressed, and reducing image quality may be necessary to achieve a smaller result.
FAQs
Frequently asked questions about Compress PDF
How do I reduce a PDF file size?
Select your PDF, choose a compression level or target size where available, and run Compress PDF. Compare the result with the original before sharing it.
Will compression reduce PDF quality?
It can. Stronger compression may affect image clarity. Choose a lighter setting when preserving visual quality is more important than file size.
Can I guarantee a specific file size?
No. The achievable size depends on the document's existing compression, images and content. A target size is a goal, not a guarantee.
Are my PDF files uploaded?
Compression runs in your browser and processes the selected PDF on your device.