Which is the best Environment like editor , browsers, os and tools for web developer with free of cost

Answer 1

Editor: IDE for whatever language (JetBrains products are exceptional); otherwise, Microsoft Visual Studio Code (open source, yes, you read that right. Microsoft, open source).
Browser: Firefox Quantum or Google Chrome.
OS: Some distro of Linux (it's free, Windows is damn overpriced).
Tools: ...eh idk

Answer 2

Editor : Notepad++
Browser : Firefox
OS : Windows
Tools : Xampp (for virtual server, php etc. )