Common uses for PDF compression
- Reducing file size for email attachment limits
- Making PDFs faster to upload or download
- Saving storage space
- Sharing large files over slower connections
How PDF compression works
This tool compresses PDF files by adjusting image quality. Text and vector graphics remain sharp and readable. The slider lets you choose the balance between file size and visual quality. Lower quality settings produce smaller files but with slightly lower image fidelity. Everything happens on your device — your PDF is never uploaded or stored.
Frequently asked questions
How does PDF compression work?
Compression reduces image quality within the PDF, making the file smaller. Text and vector graphics remain sharp. Lower quality settings result in more file size reduction.
Is my PDF uploaded anywhere?
No. Everything happens in your browser on your device. Your PDF never leaves your computer.
How much can I compress a PDF?
File size reduction depends on the original content. PDFs with many high-resolution images compress more than text-heavy PDFs. Try different quality settings to find the right balance.