About PDF Optimizer & Metadata Cleaner
Product Documentation, Architecture & Offline Privacy Verification
What It Does
Strip hidden metadata (Author, Title, etc.) and perform structural reserialization. Note: Does not compress images.
How It Works
Key Features
- 100% Secure & Private: Zero server uploads. Your documents stay safely on your computer.
- Metadata Cleanup: Removes old titles, authors, and hidden metadata fields embedded in the document properties.
Limitations & Compatibility
Frequently Asked Questions
Are my PDFs uploaded to a server?
No. The PDF Optimizer tool uses JavaScript to optimize your files completely locally on your device. Your sensitive documents never touch our servers.
How does this optimizer work?
It rewrites the internal structure of the PDF document, packs objects into streams, and strips out unused metadata or unreferenced objects left behind by incremental saves.
Why did my file size stay the same or get larger?
If your PDF is already well-optimized or consists mainly of high-resolution images, structural cleanup won't reduce its size. In some cases, re-serializing the PDF graph can slightly increase the file size. This tool does NOT perform image downsampling or JPEG recompression.
Ready to use PDF Optimizer & Metadata Cleaner?
100% private, instant offline processing directly in your browser with zero data retention.
