HTML5 File Extension

What is HTML5 file?

HTML5 filename suffix is mostly used for HTML5 Hypertext Markup Language Revision 5 Source files. Files with HTML5 extension may be used by programs distributed for , Linux, Mac OS, Windows platform. Files with HTML5 extension are categorized as Web Files files. The Web Files subset comprises 303 various file formats. Users are advised to use Windows Notepad software for managing HTML5 files, although 10 other programs can also handle this type of file. On the official website of Microsoft Corporation developer not only will you find detailed information about theWindows Notepad software, but also about HTML5 and other supported file formats.

Programs which support HTML5 file extension

Below you will find an index of software programs that can be used to open HTML5 files divided into 4 categories according to system platform supported. HTML5 files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

How to open file with HTML5 extension?

There can be multiple causes why you have problems with opening HTML5 files on given system. Fortunately, most common problems with HTML5 files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The list below will guide you through the process of addressing the encountered problem.

Step 1. Install Windows Notepad software

The main and most frequent cause precluding users form opening HTML5 files is that no program that can handle HTML5 files is installed on user’s system. The most obvious solution is to download and install Windows Notepad or one to the listed programs: Mozilla Firefox, Adobe Dreamweaver, Sublime Text. Above you will find a complete listing of programs that support HTML5 files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Windows Notepad website and download the installer.

Step 2. Update Windows Notepad to the latest version

You still cannot access HTML5 files although Windows Notepad is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. The reason that Windows Notepad cannot handle files with HTML5 may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Windows Notepad.

Step 3. Set the default application to open HTML5 files to Windows Notepad

If the issue has not been solved in the previous step, you should associate HTML5 files with latest version of Windows Notepad you have installed on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

The procedure to change the default program in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the HTML5 file
• Next, select the Choose another app option and then using More apps open the list of available applications
• Finally select Look for another app on this PC, point to the folder where Windows Notepad is installed, check the Always use this app to open HTML5 files box and conform your selection by clicking OK button

The procedure to change the default program in Mac OS

• By clicking right mouse button on the selected HTML5 file open the file menu and choose Information
• Open the Open with section by clicking its name
• Select Windows Notepad and click Change for all...
• A message window should appear informing that This change will be applied to all files with HTML5 extension. By clicking Continue you confirm your selection.

Step 4. Check the HTML5 for errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper HTML5 file. Problems with opening the file may arise due to various reasons.

1. The HTML5 may be infected with malware – make sure to scan it with an antivirus tool.

Should it happed that the HTML5 is infected with a virus, this may be that cause that prevents you from accessing it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. HTML5 file is infected with malware? Follow the steps suggested by your antivirus software.

2. Ensure the file with HTML5 extension is complete and error-free

If the HTML5 file was sent to you by someone else, ask this person to resend the file to you. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. It could happen the the download process of file with HTML5 extension was interrupted and the file data is defective. Download the file again from the same source.

3. Verify whether your account has administrative rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle Windows Notepad

The operating systems may note enough free resources to run the application that support HTML5 files. Close all running programs and try opening the HTML5 file.

5. Verify that your operating system and drivers are up to date

Latest versions of programs and drivers may help you solve problems with HTML5 Hypertext Markup Language Revision 5 Source files and ensure security of your device and operating system. It may be the case that the HTML5 files work properly with updated software that addresses some system bugs.

Do you want to help?

If you have additional information about the HTML5 file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on HTML5 file.