.MHTML File Extension

MIME Encapsulation of Aggregate HTML

MHTML is an initialism for "MIME encapsulation of aggregate HTML documents". It combines HTML code and companion resources like images represented by external hyperlinks into a single computer file. T...

General Information

Title MHTML File Extension
Extension .mhtml
Full Form MIME Encapsulation of Aggregate HTML
File Type Web Page Archive
Developer World Wide Web Consortium
MIME Type multipart/related

File Function

Primary Function Save webpage
Additional Functions Archive content
Features Single file, Integrated resources

File Characteristics

Quality Preserves layout
Supports Layers N/A
Supports Transparency N/A
Editable By software

Use Cases

Offline Reading Yes
Email Attachments Yes
Web Content Distribution Yes
Data Archiving Yes

Security and Practices

Security Risks Script execution
Best Practices Scan for malware, Disable scripts

Historical/Version Information

Initial Release Late 1990s
Standardization RFC 2557 (March 1999)

Associated Types

Similar Extensions .html, .htm

Software Compatibility

Software Usage Policy OS Compatibility
Microsoft Edge Free Windows, macOS
Internet Explorer Free Windows
Google Chrome Free Windows, macOS, Linux
Mozilla Firefox Free Windows, macOS, Linux
Opera Free Windows, macOS, Linux