# How can I filter which files the user is able to select for the upload?

If you are using our [Uppy file uploader](/docs/sdks/uppy.md) you can set`allowedFileTypes` via the [restrictions](https://uppy.io/docs/uppy/#restrictions) option

Even if you have already limited files on the client-side, you should also limit them on the back-end. For this, you can use Transloadit's [file filtering](/docs/robots/file-filter.md)capabilities.