The most accurate and reliable free OCR software that can be used online is Google Docs. It is a web-based word processing software that has an OCR feature that allows users to convert PDF files into editable text for free. Another good option is Sejda, which is a free OCR software available in the browser and also offers a desktop client for Windows, macOS, and Linux. It is recommended for users who want to quickly extract text from PDFs and images. OCR Space and Online OCR are also considered the best free online Optical Character Recognition programs. SimpleOCR is recommended for batch OCR of scanned images for free on Windows and supports multiple languages. LightPDF OCR tool is ideal for converting images to PDF, Word, and Excel format.