How to open HTML5 file extension?

The author of advice: Mr Brankiewicz

HTML5 files are incessantly popular. However, a file name containing HTML5 file extension is problematic for some of the users. They have problems with correct opening of a file with HTML5 extension. However, it should be remembered that HTML5 file extension can match one or more types of files. The most popular is HTML5 Hypertext Markup Language Revision 5 Source but if there are others, you will find information concerning them below.

So, it is worth looking close at the problem concerning HTML5 files and search for its solution.

A list of programs supporting files types with HTML5 extension can be found below. Applications are sorted according to appropriate operational systems and their popularity.

  • HTML5 Hypertext Markup Language Revision 5 Source

    .html5 file extension

    Category: Internet Files

    OS Software
    Windows Microsoft Windows NotePad Microsoft Windows NotePad
    Adobe Dreamweaver Adobe Dreamweaver
    Sublime Text Sublime Text
    Firefox Firefox
    Opera browser Opera browser
    Microsoft Internet Explorer Microsoft Internet Explorer
    SWF Decompiler SWF Decompiler
    MAC OS TextEdit TextEdit
    Safari Safari
    Linux gedit gedit

How to check if a file we want to open is not infected by malware or viruses?

  • Download Malware/viruses removal tool from HTML5 files in the Windows system.
  • Click “Start scanning” and wait until the programme performs the scanning process on your computer.

What are the reasons of errors concerning HTML5 extension of files?

The problem that often causes damage concerning HTML5 extension are Windows system registry errors. That is why, in the first place it is recommended to:

  • Scan computer in order to identify, repair and open the HTML5 file
  • Check system registry from the angle of hidden errors
  • Repair file’s associations with programs in the system registry

If you are not sure if the above problems concern you, you should consider other frequent irregularities:

  • You do not have an appropriate application installed that supports HTML5 file extension
  • HTML5 file is corrupted
  • The application’s version necessary to open the file is not correct
  • The file is not assigned to an appropriate program

Solving problems with HTML5 files


If HTML5 file does not open, firstly, it is worth using files associations built in the Windows system with application that can support them. In order to do it, you should double-click a HTML5 file icon. A list of programs that probably support such a file will appear. It is enough to choose one of them so that Windows would open a given extension with it. Incorrect file’s association will result in Windows trying to open HTML5 file with a wrong program all the time even if there is an appropriate application supporting this format on a drive. In this case, it is necessary to perform the above mentioned registry scanning and associations’ repair.

If associations are correct and Windows still cannot open the file, most probably the computer does not have appropriate software supporting files with name containing HTML5 in their extension. The solution to this problem is very simple. You should buy or download a free (if they exist) application that will allow you to open, browse and edit HTML5 format. It is no risk because many paid programs have free test versions enabling to check their functionality.

Do you have extra information about a HTML5 file? [ Add information about a HTML5 file ]

5 564

of file extensions

8 858

of file types

5 504

of applications opening the files

1 661

of producers