Reveal hidden metadata, revisions, signatures, and forensic signals
Reveal what is hidden inside any PDF: author and editor history, digital signatures, post-signing edits, embedded files, JavaScript, hidden text and forensic fingerprints. Free for the basics, Pro for full revisions and forensic checks.
pdf-secrets (also known as PDF Inspector) is a forensic-grade PDF analysis tool that surfaces metadata, revision history, signatures and security signals that most PDF readers do not show.
Yes — basic metadata, fonts, structure and signature counts are free. Pro unlocks XMP, annotations, full signatures, embedded files and JavaScript. Business unlocks revision extraction, hidden text, PDF/A, image EXIF and the forensics tab.
Yes. If the file has a digital signature, we compare the signed byte range to the rest of the file and surface every revision that was added afterwards.
Encrypted-but-readable PDFs (no password, just permissions) work. Password-protected PDFs need to be unlocked first using our Unlock PDF tool.
No. Your PDF is held in temporary storage just long enough to extract the report, then deleted. The JSON report itself is kept for 30 days for logged-in users (1 hour for guests).