fonte: http://www.oxhow.com/free-online-ocr-services-to-convert-images-to-text/
But, this technology is still under development and there is no such application that works 100% when performing OCR. Though, Google Docs can be used to extract text from images, here is five more web tools that you can try for OCR and suggest our readers the best performing tool.


FREE-Online-OCRFree Online OCR is a free service that allows you to easily convert scanned documents, faxes, photos into editable and searchable text. Free-online-ocr.com is the site that has an easy interface to work, I have found so far. You can easily find the options for uploading and converting an image to text. It also provides the options to convert documents into 4 popular formats – .doc, .pdf, .rtf and .txt. It accepts all formats of images like GIF, BMP, JPEG, TIFF or PNG. It does also have an integrated dictionary. The conversion speed is good and you have no need to register in this site.


i2OCR- Convert images to texti2OCR.com is a free service with no sign up, no limitation of uploaded file size or number of input files per hour. The interesting feature is that you can choose between 33 different languages before converting the uploaded file into text format. It also has More Productivity Tools tab that includes various options to design your pages to give Phonetic keyboard layout, graphical symbols, Arabic Transliteration etc..


NewOCR.com is a free online service based on Tesseract Optical Character Recognition engine. NewOCR.com feels a bit cluttered with lots of advertisements. It analyzes the text from any image file that you upload, and then converts the text from the image so that you can easily edit it on your computer. It supports 39 languages including Greek, Chinese, Slovakian and Vietnamese. You can save recognition results as .txt, .html, .doc, .pdf, .rtf, LibreOffice and .odt extensions. There is no need to register in this site also.


Free-OCR.Com is a free online tool to extract text from any image from JPG, GIF, TIFF, BMP or PDF extensions. This also has a pretty interface with great converting speed. Despite being free service, you can’t upload a file bigger than 2MB and no wider or higher than 5000 pixels plus. There is a limit of 10 image uploads per hour. Read more on how to pickup text from images online.


Online-OCR to convert images to text
OnlineOCR.Net is also an easy to use interface service that recognizes and converts text and characters from PDF scanned documents, photographs and digital camera captured images. It supports 32 languages. You can extract text from JPG, JPEG, BMP, TIFF, GIF format images and convert into editable .doc, .txt, .pdf, .html formats. It also provides .xls or MS excel file format in output choice as well. There is a limit of 15 images per hour for users who don’t sign up to use their service. However, signing up with the service removes the limitation.
Let us know which service did you find more easy and useful.