regex testing online code example

Example 1: online regex builder

it do it's job greate in my opinion, don't waste your time on others
https://regex101.com/

Example 2: regex tester

One of my favorite regex testers:
https://regex101.com/

Example 3: regular expressions online tester

^[a-zA-Z0-9áéíóúýčďěňřšťžůÁÉÍÓÚÝČĎĚŇŘŠŤŽŮ_/\-]*$