Verify PDF Authenticity & Detect Manipulation
How our advanced analysis engine protects you from fake documents.
Upload Your PDF
Free: up to 50 MB per PDF. Pro and AI: up to 100 MB per PDF.
Privacy Note: Your file is transmitted over HTTPS. The core checker does not retain the original upload after the request; the result metadata follows the retention terms in our Privacy Policy.
Instant Analysis
Our system analyzes your PDF in seconds, extracting all available metadata including:
- Creation date & time
- Last modification date
- Author information
- Creator application
- PDF producer/library
- PDF version
- Page count
- Title & subject
Review Results
Explore your results through our organized tabs:
Understanding Your Results
✓ Verified PDF
The document passes all basic verification checks, including valid PDF format and presence of key metadata.
⚠ Review Needed
Some verification checks didn't pass. This doesn't necessarily mean the document is invalid, but some expected metadata may be missing.
ℹ Document Modified
The document has been modified since its original creation. This is common and not necessarily a concern, but the edit timeline shows when changes were made.
Explore Our PDF Tools
Learn more about our specialized PDF analysis and optimization features
How We Validate PDFs
Learn about our advanced validation algorithms that check PDF structure, integrity, and compliance standards.
How We Detect AI PDFs
Discover how we identify AI-generated content by analyzing metadata signatures and software fingerprints.
How We Optimize PDFs
See how our compression algorithms reduce file size by up to 80% while preserving document quality.
Frequently Asked Questions
Is my PDF file stored on your servers?
The core checker does not retain the original PDF after the request. Extracted metadata and the result record are retained according to your account status and our Privacy Policy.
Can PDF metadata be faked or modified?
Yes, PDF metadata can be modified. The metadata we show is what's embedded in the file, but it should be treated as informational rather than proof of authenticity.
Why does my PDF show no creation date?
Not all PDFs include creation date metadata. This depends on the software used to create the PDF and its settings.
What's the maximum file size?
Free: up to 50 MB per PDF. Pro and AI: up to 100 MB per PDF.