How accurate is PDF modification detection?

Our PDF modification detection system provides high accuracy through multi-layer analysis combining metadata validation, structural analysis, and signature verification. The accuracy depends on several factors: the quality of PDF metadata, the sophistication of modification attempts, and the PDF creation tools used.

Our system can detect most common PDF editing scenarios including metadata changes, content modifications, and structural alterations. However, sophisticated manipulation techniques or unusual PDF creation workflows may occasionally produce unexpected results.

Internally we use a confidence score (0-100) to decide the result; you only see a binary answer: the PDF has been modified (yes) or it has not (no). For critical decisions, we recommend using our PDF authenticity checker as part of a broader verification strategy rather than relying solely on automated results.