What does Compress PDF do?
Reduce PDF file size by optimizing structure or downsampling page images.
Compress PDF accepts PDF files, and produces PDF output.
Your PDF files are processed locally in your browser — they are never uploaded to our servers.
How to use Compress PDF
- 1Drag and drop your file onto the upload area, or click “Choose file”.
- 2Adjust the compress pdf settings to suit your needs.
- 3Click the main action button and wait a moment while it is processed on your device.
- 4Preview the result and download your PDF file.
Supported formats
- Input
- Output
Frequently asked questions
Is Compress PDF free?
Yes. Compress PDF is completely free with no sign-up and no watermarks.
Are my files uploaded?
Your PDF files are processed locally in your browser — they are never uploaded to our servers.
Is there a file size limit?
Free usage supports files up to 200 MB. Because processing happens on your device, very large files depend on your device's available memory.