About OCR PDF Online (Scanned PDF to Text)
Unlike regular PDF to Text (which reads an existing text layer instantly), this tool is specifically for scanned PDFs with no text layer at all β each page is rendered as an image, then OCR runs on it individually.
This is genuinely slower than text-layer extraction, since real recognition work happens on every page rather than reading data that already exists. Works well under roughly 20 pages; longer documents take proportionally longer and may strain browser memory.
If you’re unsure whether your PDF needs this or the faster PDF to Text tool, try that one first β it will return no text if OCR is actually needed, telling you which tool applies.
