What Is an MHTML Document?

Web archive (English: MIME HTML or MIME Encapsulation of Aggregate HTML Documents, also known as single file web page or web archive file) is a multi-purpose Internet mail extension format, a multi-attachment web page (such as contains a large number of pictures, Flash animation, Java applet The program's web page) is stored as a single file that can be used to send HTML emails. This single file is called a web archive file with an extension of .mht. This format is sometimes referred to simply as MHT. [1]

Graphics and other functions in the HTML page must be stored separately and referenced on the original file. MHTML can save attachments on a web page as a single web page.
Microsoft Office (Word [1], Excel, PowerPoint, Access) can create and edit MHTML files.
On the Linux platform, the program kmhtConvert can convert files to MHTML format.
Some browsers have a native way to save web pages as MHTML, and some browsers can directly support MHTML formats through third-party extensions. Because the way of saving as MHTML is not standardized, the effect of reading by each browser is slightly different.
The format of the MHTML file is as follows: 
  Subject: Title Date: Wed, 15 Dec 2004 10:05:01 +1000
 Content-Type: multipart / related;
 Content-Transfer-Encoding: quoted-printable
 Content-Location: file: // C: /fishier.html
 This is a multi-part message in MIME format.

 Content-Type: text / html;
 <HTML>
 <HEAD>
 <TITLE> Title </ TITLE>
 </ HEAD>
 <BODY>
 ...
 </ BODY>
 </ HTML>

 Content-Type: image / gif
 Content-Transfer-Encoding: base64
 Content-Location: file: // C: /image.gif
 RHLJbDYX0KhHzv7yGcCgghhgHLJbDYX0KhHzv7yGcChkNdjn + Nfn + NXm98 / i98rf9sfe9b / Z9L3X
 87fU8qP8afL8AHzvfg7yGcChkNIwMZHLJbDYX0KhHzv37yGcChkNIw2Oj5AAAZIAlhAAACwAAAAA
 er8JhHg8PhgQBrPZwG673 + 6CoUCv2 + 91gn5PGPT7fgOCg4SFhQKIiYoCAY2Oj5AAAZIAlJWXACEA
 4SFh ==
Subject is the document title, Content-Type is the MIME attribute of the file, Content-Location is the address of the original file, and Content-Transfer-Encoding is the encoding format.

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