https://blog.beforeupload.com/feed.xml Before uploading a file to AI, see the invisible layer. en https://blog.beforeupload.com/how-prompt-injection-hides-inside-everyday-file-formats/ A file can look harmless to a person and still contain text or metadata designed to steer an AI model. In practice, prompt injection is not limited to chat boxes. It can ride inside documents, PDFs, spreadsheets, slide decks, images with OCR-visible text, and embedded metadata. Understanding where those instructions live is the first step to safer file handling. Tue, 12 May 2026 17:12:30 GMT https://blog.beforeupload.com/how-prompt-injection-hides-inside-everyday-file-formats/ https://blog.beforeupload.com/why-ai-file-uploads-carry-more-risk-than-they-seem/ Uploading a file to an AI assistant feels routine, but the file often contains a second layer of information beyond the visible text or image. Metadata, revision history, hidden rows, embedded comments and background details can all travel with the upload. Understanding that invisible layer is becoming a basic digital hygiene skill for teams and individuals alike. Tue, 12 May 2026 17:03:41 GMT https://blog.beforeupload.com/why-ai-file-uploads-carry-more-risk-than-they-seem/