Fortify: How to disable password confirmation field (Jetstream)

Solution

Add this method to app/Actions/Fortify/CreateNewUser.php file.

use Laravel\Fortify\Rules\Password;

// ...

protected function passwordRules()
{
    return ['required', 'string', new Password];
}

If you are using Jetstream, you should also remove these line in resources/views/auth/register.blade.php

<div class="mt-4">
    <x-jet-label for="password_confirmation" value="{{ __('Confirm Password') }}" />
    <x-jet-input id="password_confirmation" class="block mt-1 w-full" type="password" name="password_confirmation" required autocomplete="new-password" />
</div>

Explanation

Fortify has an action class which is responsible for user creation.
You can find it at app/Actions/Fortify/CreateNewUser.php.

You can see the line:

'password' => $this->passwordRules(),

Under hood it uses passwordRules method from PasswordValidationRules trait. That method returns array with confirmed element:

return ['required', 'string', new Password, 'confirmed'];

confirmed is a rule responsible for email confirmation, so we made our own passwordRules method which doesn't has confirmed rule.