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There are two well-known OCR software available for free namely - SimpleOCR and JOCR but both utilities require user to download and use them from desktop, however there is a better way to get images/documents converted in editable formats using free web-based OCR services, these free services allows users to upload documents in various formats and download editable version in format of their choice.
Image may be NSFW.
Clik here to view.
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I tested some of these free online OCR services and here is a list of best ones which will get the job done easily and accurately.
