File Extension Database

Open CML File

In the world of computing, there are various types of files and file formats that cater to different needs and purposes. One such file extension is CML, which can stand for several formats, including Chemical Markup Language, Chemical MIME, and Chempyl. This article will discuss the possible formats and ways to open and use files with CML file extensions, and provide relevant information and resources.

Chemical Markup Language (CML)

Chemical Markup Language (CML) is an open-standard XML-based file format used to describe and exchange chemical data, including molecular structures, reactions, and spectra. Developed by Peter Murray-Rust and Henry Rzepa, CML files can be used for computational chemistry, data mining, and the creation of chemical databases. To open and work with CML files, you can use various applications and tools designed for chemistry and bioinformatics, such as:

JChemPaint - An open-source editor and viewer for chemical structures in CML format.
Avogadro - A free and open-source molecular editor that can read, edit, and save CML files.
Open Babel - A chemical toolbox designed to exchange chemical data in various formats, including CML.

Chemical MIME

In the past, CML was sometimes used as an abbreviation for Chemical MIME (Multipurpose Internet Mail Extensions), which was an early effort to standardize chemical data exchange on the internet. This usage is now largely obsolete, as Chemical MIME has evolved into the modern Chemical Markup Language. For historical purposes only, some older applications or resources may still reference the CML file extension as Chemical MIME.

Chempyl

Chempyl is a discontinued application for Windows, which was used to draw and visualize chemical structures and reactions. It used its own proprietary file format with the CML extension, which is unrelated to the XML-based Chemical Markup Language. While Chempyl itself is no longer supported, you might still encounter CML files created with this software. In order to access such files and their contents, you may need to seek a converter that can transform Chempyl CML files into a more popular chemical structure format such as SDF (Structure Data Format) or CML (Chemical Markup Language).

CML File Important Information

When handling files with the CML extension, it is essential to determine their specific format and origin, as there are multiple uses for this file extension, each of which requires a different method to access and utilize the contained information. For modern chemical data, you will most likely encounter Chemical Markup Language (CML) as the primary format, with various tools and applications available to work with these files. Always ensure that you are using the appropriate software for the CML format you are dealing with, and don't forget to refer to the provided resources in this article for further assistance.

How Can I Open CML File on Windows

We researched and learned that the best way to open CML file is to find a CML file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a CML file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open CML file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as CML file opener then try to search online for "CML viewer", "application to open CML file" or "open CML file" queries in the search engine you like.
Install the application you found and check if it can open CML file

How Can I Open CML File on Mac OS

We recommend to find a CML file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a CML file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with CML file.
If you know the Mac OS application which can work as CML file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open CML file in it.
If you don't know the application which can open CML file then try to search for "CML viewer", "application to open CML file" or "read CML file" queries in the online search engine you like.
Install the application you found and check if it can read CML file

How Can I Open CML File on Android

If you downloaded a CML file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded CML file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "CML".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "CML viewer", "CML file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open CML File on iPhone or iPad

To open CML File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the CML file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "CML". This way you can find apps which can open CML files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "CML viewer" or "CML file" online in your favorite search engine.

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