PDF Metadata Tools
Control your digital footprint. View hidden data, edit document properties, or remove common metadata before sharing.
Edit Metadata
Update titles, authors, creation dates, and keywords. The easiest way to organize your digital library or fix document errors.
View & Inspect
Detailed inspection of your PDF. View creator tools, software identifiers, encryption status, and common XMP properties.
Clean & Sanitize
Remove common document metadata, custom Info properties, XMP and PieceInfo references, document IDs, and page thumbnails before sharing.
Understanding Hidden PDF Data
Most users believe a PDF only contains the text and images they see on screen. However, standards like XMP (Extensible Metadata Platform) and the PDF Info Dictionary store vast amounts of background information.
Standard Properties
The "Info Dictionary" stores common properties such as Title, Author, Subject, Keywords, Creator, Producer, and dates.
XMP & Advanced
XML-based data that can contain creator software, timestamps, document identifiers, descriptive properties, and other application-defined fields.
Whether you need to edit these details for better organization or remove them for privacy, Lyonite provides the tools to handle both layers of data.
Why local processing reduces exposure
Many online PDF tools process documents on remote servers. Lyonite's metadata tools take a local-processing approach so the PDF does not need to be uploaded for these operations.
Other Editors
With a server-based PDF tool, the document is uploaded for remote processing, so privacy depends on that provider's transmission, retention, and security practices.
- ❌ Your file travels across the internet
- ❌ You have to wait for upload/download
- ❌ The provider must receive the document for processing
The Lyonite Approach
We don't take your file. Instead, we send the software to you. The tool runs entirely inside your web browser.
- Your file never leaves your computer
- Instant processing (no uploading)
- No document upload required for metadata processing