Compress PDF — Reduce PDF File Size Online Free
Compress PDF files for free. Reduce file size by removing unused objects and optimizing the document structure. No sign-up, no file uploads to servers.
Frequently Asked Questions
How does PDF compression work?▼
Our tool loads your PDF and re-serializes it, removing unused objects, duplicate resources, and optimizing the internal structure. This can significantly reduce file size without affecting visual quality.
Will compression reduce the quality of my PDF?▼
No. The compression process optimizes the file structure without re-encoding images or text. The visual quality remains identical to the original.
How much can I reduce the file size?▼
Savings vary depending on the PDF. Files with unused objects, metadata, or redundant resources can see significant reductions. Some well-optimized PDFs may see minimal savings.
Are my files uploaded to a server?▼
No. All compression happens entirely in your browser. Your PDF files never leave your device.
Is there a file size limit?▼
No hard limit. Since processing happens in your browser, very large files may take longer depending on your device. Most files compress in seconds.