CHM
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| − | [[CHM]] (Compiled HTML Help) is a Microsoft format for help files. While it is proprietary, it has been reverse engineered, and many software applications can read it. | + | [[CHM]] (Compiled HTML Help), AKA '''Microsoft Help 1''', is a Microsoft format for help files. While it is proprietary, it has been reverse engineered, and many software applications can read it. |
It is a compressed binary file format, including content in [[HTML]] as well as other related data. | It is a compressed binary file format, including content in [[HTML]] as well as other related data. | ||
| + | |||
| + | [[Microsoft Help 2]] was intended as a successor, but never saw much use. | ||
| + | |||
| + | == Identification == | ||
| + | Files start with hex {{magic|49 54 53 46 03 00 00 00}}, which the first four bytes is ASCII "ITSF", for Info-Tech Storage Format, the generic data file format by Microsoft. | ||
== Format description == | == Format description == | ||
| − | |||
* [http://chmspec.nongnu.org/latest/ chmspec] | * [http://chmspec.nongnu.org/latest/ chmspec] | ||
== Software == | == Software == | ||
| − | |||
* [https://savannah.nongnu.org/projects/chmdeco chmdeco] | * [https://savannah.nongnu.org/projects/chmdeco chmdeco] | ||
* [http://portableapps.com/apps/office/kchmviewer-portable KchmViewer] | * [http://portableapps.com/apps/office/kchmviewer-portable KchmViewer] | ||
| Line 23: | Line 26: | ||
* [http://www.russotto.net/chm/ CHM Tools] | * [http://www.russotto.net/chm/ CHM Tools] | ||
* [[7-Zip]] | * [[7-Zip]] | ||
| + | * [https://github.com/dottedmag/archmage archmage] | ||
| + | |||
| + | == Sample files == | ||
| + | * {{DexvertSamples|document/chm}} | ||
== Links and references == | == Links and references == | ||
| − | |||
* [https://en.wikipedia.org/wiki/Microsoft_Compiled_HTML_Help Wikipedia article] | * [https://en.wikipedia.org/wiki/Microsoft_Compiled_HTML_Help Wikipedia article] | ||
* [http://www.infoworld.com/article/2894256/security/ancient-help-file-format-carrying-new-cryptowall-attacks-on-pcs.html Ancient help-file format carries new CryptoWall attacks into PCs] | * [http://www.infoworld.com/article/2894256/security/ancient-help-file-format-carrying-new-cryptowall-attacks-on-pcs.html Ancient help-file format carries new CryptoWall attacks into PCs] | ||
== See also == | == See also == | ||
| − | + | * [[Microsoft Help 2]] | |
* [[HLP (WinHelp)]] | * [[HLP (WinHelp)]] | ||
[[Category:Microsoft]] | [[Category:Microsoft]] | ||
| + | [[Category:Windows]] | ||
| + | [[Category:Hypermedia]] | ||
Latest revision as of 02:50, 30 June 2024
CHM (Compiled HTML Help), AKA Microsoft Help 1, is a Microsoft format for help files. While it is proprietary, it has been reverse engineered, and many software applications can read it.
It is a compressed binary file format, including content in HTML as well as other related data.
Microsoft Help 2 was intended as a successor, but never saw much use.
Contents |
[edit] Identification
Files start with hex 49 54 53 46 03 00 00 00, which the first four bytes is ASCII "ITSF", for Info-Tech Storage Format, the generic data file format by Microsoft.
