There are 6 other file types using
the CML file extension!
.cml - Chemical Markup Language document
.cml - Crazy Machines saved laboratory file
.cml - PADGen company info
.cml - ProWORX Nxt comment data
.cml - Integration Designer file
.cml - CryptoMailer encrypted data
CML file extension - Filetopia Collection Manager list file
What is cml file? How to open cml files?
The CML file extension is also used for one of the default formats in Filetopia free communications software bundle.
The default software associated to open cml file:

Filetopia 
Company or developer:
Filetopia Inc.
Filetopia is a free communications software that includes: instant messaging, chat, a powerful file sharing system with a search engine, online friends list and message boards.
Help how to open:
Due the variability and uncertainty of this file type group, there is no general information available, about how to open this various data file format. However most files with extension from this group are usually not meant to be opened or viewed directly. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.
For general information try to look at:
Identifying unknown file formats
How to convert:
Due the variability and uncertainty of this file type group, there is no general information available, about how to convert this various data file format. However most files with extension from this group are usually not in formats, which can be converted. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.
List of recommended software applications associated to the .cml file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cml file, edit cml file, convert cml file, view cml file, play cml file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with cml file - Filetopia Collection Manager list file
Click on the software link for more information about Filetopia. Filetopia uses cml file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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