FineReader Online is capable of recognizing German and Latvian text printed between 1600 and 1937 in Fraktur fonts.
To recognize documents that contain Fraktur fonts, open your profile’s settings and select the "Some of my documents are printed in Fraktur" option. Then, in the Recognition section, click the "Enable Fraktur OCR" link to the right of the list of languages. You can now proceed to recognize the document in the same way you recognize documents that only contain regular fonts (Arial, Times New Roman, etc.).