*WebAssembly used, no server side processing. Files are not uploaded to any servers, preserving your privacy.
Restore optar encoded files from scanned PNGs (select all of them). Make sure file names are like prefix_0001.png, prefix_0002.png etc. (prefix can be arbitrary, for example, prefix of "data.txt" will have files data.txt_0001.png, data.txt_0002.png and final output file will be called data.txt).