We’ve added a new feature into Overview: Optical Character Recognition (OCR). That means you can upload scanned PDFs and Overview will automatically read the text from them.
Overview decides when to use OCR automatically, on every page that has fewer than 100 characters of searchable text. This will make your uploads a lot slower, but you will need to OCR them anyway before you can search them, and you can’t beat the convenience.
Overview uses Tesseract for OCR, because Tesseract is free. Sometimes Tesseract produces more garbage characters than other OCR engines, such as the one included in Adobe Acrobat Pro. If you’ve already OCR’d your documents using another program, Overview will just read the previously created text.