Provide the option to show a password

Commonly, signup forms may ask users to confirm their password, so users can make sure the password they have typed is correct. Instead, you can minimize the number of inputs by allowing users to view the entered password.

Adding a tiny eye icon keeps the form minimalistic and reduces interaction cost. Plus, users feel more in control when they can view the otherwise-hidden data they provided and check its correctness. No need to mention that login forms benefit from this feature, too!