What is a CFML file?
A file with .cfml extension is a ColdFusion Markup Language file that is used to create web page. It refers to a set of rules used to define how the ColdFusion application will be developed by the programmer. ColdFusion is a programming language that is used to to create sever-side web applications quickly and with less than other technologies such as ASP, PHP, etc. Some of the applications that can open CML files include Adobe ColdFusion 2018, Adobe ColdFusion Builder, and Adobe Dreamweaver.
CFML File Format - More Information
CFML files are markup files and contain web elements in the form of tags. These are text files that can be opened and edited in any text editor. CFML files consist of several tags that are similar to HTML and usually comprise of an opening and a closing tag. These tags can also contain one or more attributes.
Tags Syntax
Following is the generalized syntax of CFML tags.
<tagname>
Code/text that is affected by the surrounding tags.
</tagname>
Most tags accept attributes and are defined as follow.
<tagname attribute="value">
Code/text that is affected by the surrounding tags.
</tagname>
Some of these tags also accept multiple attributes with the following syntax.
<tagname attribute1="value" attribute2="value">
Code/text that is affected by the surrounding tags.
</tagname>
CFML Code Example
Here’s an example that uses an actual CFML tag - the cfoutput tag:
<cfoutput>
#firstname#
</cfoutput>
Key Characteristics of CFML Files
| Characteristic | Description |
|---|---|
| File Extension | .cfml |
| Platform Independence | CFML applications run on multiple ColdFusion engines (Adobe ColdFusion, Lucee, Railo) and can be deployed on various operating systems including Windows, Linux, and macOS. |
| Rapid Development Focus | Designed with productivity in mind, CFML enables developers to build complex functionality with fewer lines of code compared to many other languages, particularly for database-driven web applications. |
| Mixed Content Delivery | CFML files can output multiple content types from a single script—HTML, JSON, XML, PDF, Excel files—making them versatile for full-stack web development. |
| Server-Side Execution | All CFML code executes on the server before being sent to the client, ensuring business logic and sensitive data remain secure and hidden from end-users. |
| File Extension Flexibility | CFML code can be saved in multiple file extensions (.cfm, .cfc, .cfml) depending on the component type and server configuration, each serving specific purposes in application architecture. |
| Backward Compatibility | The language maintains strong backward compatibility, allowing applications written decades ago to continue running on modern servers with minimal modifications. |
Modern Implementation and Evolution
Today’s CFML is far more sophisticated than its early versions. Modern implementations include:
Integrated Dependency Management through CommandBox (similar to npm or Composer)
Support for Modern Front-End Frameworks like Vue.js and React within CFML applications
Containerization with Docker for simplified deployment
Microservices Architecture capabilities
Integration with CI/CD pipelines and modern development workflows
The open-source Lucee Server has brought renewed energy to the CFML ecosystem, offering improved performance, reduced costs, and enhanced compatibility with contemporary development practices while maintaining compatibility with existing CFML codebases.
FAQ
Q1: Is CFML still actively used and supported today?
A: Yes, CFML is actively maintained by both Adobe ColdFusion and the open-source Lucee project, with regular updates and security patches.
Q2: Is ColdFusion and CFM still used today?
A: Yes, while its market share has evolved, Adobe ColdFusion and the open-source Lucee engine are actively maintained and power many business-critical applications worldwide.
Q3: How does CFML compare to PHP or Node.js?
A: CFML offers more built-in functionality for enterprise applications and faster development for database-heavy projects, while PHP and Node.js have larger communities and more third-party libraries.
Q4: Can CFML applications integrate with JavaScript frameworks?
A: Absolutely, CFML works seamlessly as a backend API for modern JavaScript frameworks like React, Angular, and Vue.js.
Q5: Is CFML difficult to learn for new developers?
A: CFML’s tag-based syntax is considered beginner-friendly, especially for those with HTML experience, though mastering its full capabilities requires time like any language.
Q6: What types of companies still use CFML?
A: Many government agencies, financial institutions, healthcare organizations, and large enterprises continue to rely on CFML for mission-critical applications due to their stability and long-term investment.
