About textovirtual.pt
textovirtual.pt is a toolbox of text tools for people who write in Portuguese: convert, clean, compare, count, spell, validate and see text in 3D.
Each tool has automated tests and only implements public rules: the NIF check digit, the IBAN modulo 97, Morse code from ITU-R M.1677-1, the ICAO/NATO spelling alphabet. What is not public or not clear-cut is not here.
To pull text out of PDFs and photos, see extrair.pt.