How to make 404 page

How to make 404 page, help me.

What server software is being used (Apache or IIS)?

Is the 404 page for use with an existing app?

thanks SpacePhoenix

The main thing to keep in mind is that a 404 error page is just another web page. It is created in the usual way with HTML (and possibly CSS), and has the usual page structure, including <head> and <body> sections, and so on.

What makes it different is how you deploy it, and that depends on your web server. Often, it will have a designated name, such as 404.shtml, and will be located on the root directory. Check your server’s documentation for specific details.

A good 404 page not only tells the visitor what has gone wrong, but gives useful links to other parts of the site (such as the home page or a site map) to help them find what they are looking for. Keep in mind that the visitor might arrive at the 404 from any sub-directory in the site, so you need to make these links absolute.

Mike