Most PDF-to-Markdown tools lose document structure or produce wrong heading levels because they only process one page at a time — losing context, hierarchy, and continuity across pages.

PageIndex OCR is a long-context OCR approach that preserves a document's global structure. It can detect true hierarchy and semantic relationships across pages, addressing common issues in traditional OCR or PDF-to-Markdown pipelines.

In internal tests, it consistently produced more accurate structures than other approaches we tried.

Feedback and ideas for improving multi-page document structure extraction are welcome.