Jan Greth wrote: Hi Jan, > short question: implemented anyone of you allready a > "Filetype"-validator? If yes: could you post it? There's a basic one included in the TYPO3.Form package[1] - maybe that helps. [1] https://git.typo3.org/Packages/TYPO3.Form.git/blob/HEAD:/Classes/TYPO3/Form/Validation/FileTypeValidator.php -- Bastian Waidelich