How PDF text extraction works
PDF is a print format, not a text format, so extraction is best-effort: we recover the reading order, strip headers, footers, and page numbers, and rejoin paragraphs that were split across pages. Cleanly exported digital PDFs — the kind produced by Word, Google Docs, or typesetting tools — convert well.
Scanned or image-only PDFs contain pictures of text rather than text itself, so there is nothing to extract. If your PDF is a scan, or the extracted text looks garbled, upload a TXT, EPUB, or DOCX version instead — those formats carry real text and chapter structure and always give the cleanest result.