PDF tools with OCR function consists of the programs for converting PDF to other file formats, and the OCR feature is to let you turn the picture of words into the searchable and editable documents.

People normally turn the documents (receipts, business cards, notes, or anything else) into image by scanner, then with OCR software, turn the scanned images into editable and searchable files that you can save or open in your other desktop programs. This kind of software saves you much time in file archiving and repurposing, no need to retype text and re-create documents.