MIME Encapsulation of Aggregate Documents, such as HTML — Wikipédia

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MHTML ( .mhtml or .mht ) is a file format offered for standardization by the IETF in 1999 as part of an RFC entitled ” MIME Encapsulation of Aggregate Documents, such as HTML »( RFC 2557 [ first ] ). This is an open and non-owner file format allowing you to save and send an HTML file which includes in its body, in mime format, images and other external elements of the corresponding HTML page . This format is natively supported by Internet Explorer browsers (from the version 6 ), Opera and Google Chrome.

This is a text file, saved with the extension .mhtml or .mht : 

Subject: Date: Wed, 15 Dec 2004 10:05:01 +1000
Content-Type: multipart/related;
Content-Transfer-Encoding: quoted-printable
Content-Location: file://C:/fichier.html
This is a multi-part message in MIME format.
--'''separation'''
Content-Type: text/html;   Title   ...  --'''separation'''
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: file://C:/image.gif
RHLJbDYX0KhHzv7yGcCgghhgHLJbDYX0KhHzv7yGcChkNdjn+Nfn+NXm98/i98rf9sfe9b/Z9L3X
87fU8qP8afL8AHzvfg7yGcChkNIwMZHLJbDYX0KhHzv37yGcChkNIw2Oj5AAAZIAlhAAACwAAAAA
er8JhHg8PhgQBrPZwG673+6CoUCv2+91gn5PGPT7fgOCg4SFhQKIiYoCAY2Oj5AAAZIAlJWXACEA
4SFh==
--'''separation'''--

Several browsers support the MHTML format, either directly or thanks to extensions. However, the way of saving a page and its resources is not standardized, which can cause compatibility problems when you want to read with a browser an MTML file created by another browser.

Internet Explorer [ modifier | Modifier and code ]

The .MHT format was introduced in the Internet Explore 5 [ 2 ] . However, he manages the scripts included in certain pages. On the Internet Explorer 8 And 9, MHTML is the default recording format.

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Opera [ modifier | Modifier and code ]

Opera supports the MTML format from the version 9.0 browser [ 3 ] .

Firefox [ modifier | Modifier and code ]

The absence of MHTML support in Firefox is considered a browser bug in 1999 [ 4 ] . However, you could read and write MHTML files in Firefox thanks to extensions. Mozilla Archive Format ( [first] ) And UNMHT ( [2] ) have extensions offering the MHT support for all versions of Firefox superior to Firefox 1.0 . However, these extensions may encounter incompatibility problems with Internet Explorer .MHT files [ 5 ] .

In the years 2010+, (and perhaps before), the ‘Android’ versions’ read and write ‘natively’ the format ‘.mht’.

Google Chrome, Safari, Konqueror [ modifier | Modifier and code ]

Safari and Konqueror offer no native support for the MHTML format.

Google Chrome 14 offers its support from , as well as Google Chrome Canary and the engine WebKit since .

ACCESS NetFront [ modifier | Modifier and code ]

Netfront 3.4 (on devices like the Sony Ericsson K850) allows you to view and save MHTML files.

  1. ↑ (in) ‘ MIME Encapsulation of Aggregate Documents, such as HTML (MHTML) », Request for comments n O 2557, .
  2. ↑ (in) ‘ New features in the Internet Explorer 5 » , Microsoft, (consulted the ) .
  3. ↑ (in) Claudio Santambrogio , ‘ …and one more weekly!» , Opera Software , (consulted the ) .
  4. ↑ (in) ‘ MTML support in Firefox » , Mozilla, (consulted the ) .
  5. ↑ (in) gardenerstouch , ‘ Feature Request: Support MS Web Archive Files » , MozillaZine, (consulted the ) .

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