Custom file processors

For custom needs in terms of file processing, registration of custom file processors is available.

Create a new processor class

The file must implement the \TYPO3\CMS\Core\Resource\Processing\ProcessorInterface and two required methods.


Will decide whether the given file should be handled at all. The expected return type is boolean.


Will then do whatever needs to be done to process the given file.

Register the file processor

To register a new processor, add the following code to ext_localconf.php

$GLOBALS['TYPO3_CONF_VARS']['SYS']['fal']['processors']['MyNewImageProcessor'] = [
    'className' => \MyVendor\ExtensionName\Resource\Processing\MyNewImageProcessor::class,
    'before' => ['LocalImageProcessor'],

With the before and after options, priority can be defined.


Only one file processor will handle any given file. Once the first match for canProcessTask() has been found, this is the processor that will handle the file. There is no cascading or sequence possible, so make sure your processor does all the work necessary.