How to check a document for hidden text
One question per page. Each guide starts with the answer, then shows the free way to check, where the free way falls short, and how we check it.
A free way to find text in a PDF that you cannot see but an AI reads, where that check falls short, and how to check PDFs automatically.
A free way to reveal white text, tiny text and other hidden content in a Word file before an AI reads it, where that falls short, and how to check automatically.
How to find white text, tiny fonts and hidden AI prompts in résumés before screening software reads them, by hand or automatically.
How to check court filings, contracts and counterparty drafts for hidden instructions aimed at AI tools, and the court cases that show why.
How editors can find hidden prompts aimed at AI reviewers in submitted papers — by hand, from LaTeX source, or automatically at submission volume.
Yes. Researchers have shown Copilot following instructions hidden in Word files, Excel files and email attachments. How it works, and how to check before Copilot reads a file.
The kinds of tools that find hidden text and prompt injection in documents, what each can and cannot see, and what to look for when you choose one.