Detect if a PDF has been modified, edited, or manipulated after its original creation. Our tool uses 8 specialized analyzers to examine metadata, signatures, structure, and hidden modifications invisible to the naked eye.
8
Analyzers
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Server Analysis
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Results
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8 Specialized Analyzers
We use advanced forensic techniques to detect modifications, even when they're invisible to the human eye
Detects which software was used to create or modify the document. If a PDF claims to be from Chrome but has characteristics of another editor, it's a sign of manipulation.
Compares creation date with modification date. If there's a significant difference, it may indicate post-creation editing.
Browsers (Chrome, Safari) always embed fonts in PDFs. If a PDF claims to be from Chrome but has no embedded fonts, it was regenerated by another tool.
If a document has a digital signature and was modified afterward, the signature becomes invalid. We detect this automatically.
Each time a modified PDF is saved, a special marker is added. We detect these markers to identify modifications.
When content is deleted, 'gaps' remain in the PDF's internal numbering. We also detect white rectangles that may be hiding original text.
Manual text editing leaves subtle variations in character alignment. We detect these patterns.
Multiple font types or inconsistencies may indicate that parts of the document were added later.
Detection Capabilities
If someone modifies a web page's HTML before printing it to PDF, the resulting PDF will be technically 'clean' because the browser generates it from scratch. In these cases, the only way to verify is to manually compare with the original source.
How It Works
Our tool performs comprehensive PDF analysis using 8 specialized server-side analyzers. Your documents are processed securely and automatically deleted after analysis.
Select or drag & drop the PDF document you want to analyze. The file is securely transmitted to our servers.
Our 8 specialized analyzers examine metadata, dates, origin, signatures, incremental updates, structure, geometry, and fonts.
Receive a complete report with findings and a final verdict: No Anomalies, Anomalies Found, Manipulation Detected, or Fraud Highly Probable.
Use Cases
Analyze evidence in legal cases. Verify document integrity presented in trials. Detect manipulation in investigations.
Verify received invoices haven't been altered. Audit contracts. Validate certificates and diplomas.
Detect manipulated CVs. Verify academic certificates authenticity. Validate references and work documents.
Verify bank statement authenticity. Validate financial documents for loan applications. Detect forged receipts.
FAQ
PDF forensic auditing is the process of examining a PDF document using scientific techniques to determine if it has been modified after its original creation. We use 8 specialized analyzers that examine different aspects of the file.
We use 8 specialized server-side analyzers that examine: metadata, creation/modification dates, document origin, digital signatures, incremental updates, internal structure, text geometry, and fonts. Each analyzer looks for specific signs of tampering.
Yes, our tool can detect if a PDF invoice was edited, including changes in amounts, dates, or any other content. We look for incremental updates, misaligned characters, and metadata inconsistencies.
Your PDF is uploaded to our secure servers for analysis only. Files are automatically deleted immediately after the analysis is complete. We do not store or retain any documents.
Our tool uses multiple forensic techniques that examine different aspects of the document for maximum accuracy. However, for legal evidence, a certified forensic expert using court-admissible tools is always recommended.
We provide 4 levels: NO ANOMALIES (document appears authentic), ANOMALIES FOUND (requires manual review), MANIPULATION DETECTED (confirmed tampering), and FRAUD HIGHLY PROBABLE (critical findings found).
Need Professional Analysis?
For legal cases, audits, or complex investigations, our certified experts provide detailed analysis with court-admissible documentation and expert testimony.
Detect modifications in invoices, contracts, and legal documents. 100% free. Files deleted after analysis.
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