.HTM File Extension

Hypertext Markup Language File

The .htm file extension is for Hypertext Markup Language. It is used to create web pages displayed in web browsers. The markups in .htm files tell browsers how to display text, images, videos and othe...

General Information

Title HTM File Extension
Extension .htm
Full Form Hypertext Markup Language File
File Type Web Page Source File
Developer World Wide Web Consortium (W3C)
MIME Type text/html

File Function

Primary Function Web content display
Additional Functions Structure webpages, Embed scripts and styles
Features Markup language, Supports multimedia

File Characteristics

Quality Depends on content
Supports Layers N/A
Supports Transparency Yes, with CSS
Editable Yes

Use Cases

Web Development Yes
Static Websites Yes
Email Templates Yes

Security and Practices

Security Risks XSS attacks, Malicious code
Best Practices Validation, Sanitization

Historical/Version Information

Initial Release 1991
Latest Version HTML5 (2014)

Associated Types

Similar Extensions .html, .xhtml, .php, .asp

Software Compatibility

Software Usage Policy OS Compatibility
Web Browsers
Text Editors