NewOCR.com - NewOCR.com is a free online OCR (Optical Character Recognition) service. NewOCR.
Tesseract - Tesseract is an optical character recognition engine for various operating systems
Onlineocr.net - Free Online OCR service allows you to convert PDF document to MS Word file, scanned images to editable text formats and extract text from JPEG/TIFF/BMP files
Chessvision.ai - Analyze chess position from any website, image or video.
pdfocr.org - Best online PDF converter in market, convert your scanned PDF to editabe DOCX, XLSX, TXT, JPG, PNG files using Optical Character Recognition (OCR) technology.
ABBYY Cloud OCR SDK - Highly-accurate ABBYY Cloud OCR SDK is available for everyone in a cloud through web API.