Your PDF-to-text pipeline is silently returning empty pages: detecting scanned PDFs and when OCR is worth it
If you feed PDFs into search, a RAG pipeline or an LLM, some of them come back with almost no text and nothing errors. Those are scanned PDFs: each page is a picture of text, with no text stored in the file. This post shows how to detect them, what OCR settings matter, and what to expect from the r…
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- 2026-11-14 14:38 · DEV Community — AI
Your PDF-to-text pipeline is silently returning empty pages: detecting scanned PDFs and when OCR is worth it