PDF Hidden Text Checker: How to Inspect a PDF
Check a PDF for invisible text, OCR layers, off-page content, annotations, attachments, and text concealed behind shapes.
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Practical, evidence-first guidance
Showing 5–8 of 32 guides
How to Check Whether PDF Redactions Still Reveal Text
Check whether black boxes in a PDF are genuine redactions or visual cover-ups that leave sensitive text selectable, searchable, or extractable.
Excel
How to Find Hidden Rows, Columns, and Sheets in Excel
Inspect Excel workbooks for hidden rows, columns, worksheets, very hidden sheets, formulas, names, comments, links, and embedded objects.
Sharing
Document Metadata Checker: What It Can and Cannot Find
Review document metadata, comments, revisions, properties, and editing residue, then remove understood content safely from a copy.
Use findings as a starting point
Automated inspection can surface evidence that deserves attention, but it cannot determine a person’s intent or guarantee that every hidden element was found. Verify important findings in the source document and preserve the original file when documenting a concern.