How Many Lines of Code Is Apache Web Server?


Heather Bennett

The Apache Web Server is one of the most popular and widely used web servers in the world. It is known for its robustness, scalability, and open-source nature. If you have ever wondered how many lines of code make up this powerful software, you are not alone.

Counting the Lines

Counting the exact number of lines of code in a complex software project like Apache Web Server can be a challenging task. The codebase of Apache is spread across several files and directories, making it difficult to give an accurate count.

However, according to estimates, the Apache 2.4.x series has around 1.5 million lines of code. This number includes both the core server components as well as various modules that provide additional functionality.

The Core Components

The core components of the Apache Web Server include the main server program (httpd), configuration files, and supporting libraries. These components handle request processing, connection management, logging, and other essential tasks.

Within these core components, you will find thousands of lines of code responsible for handling HTTP requests, parsing configuration directives, managing server modules, and much more. These lines of code determine how the server behaves and interacts with client browsers.

Modules Galore

In addition to its core components, Apache Web Server supports a modular architecture that allows developers to extend its functionality by adding modules. These modules can provide features such as SSL/TLS encryption support, URL rewriting capabilities, authentication mechanisms, caching mechanisms, and more.

The number of lines of code contributed by these modules can vary significantly depending on their complexity and scope. Some modules may consist of just a few hundred lines of code, while others may run into thousands or even tens of thousands.

Contributions and Community

One of the reasons why Apache Web Server has such a large codebase is its vibrant and active open-source community. The project has been around since 1995, and over the years, numerous developers from around the world have contributed code and improvements.

This collaborative nature has resulted in a feature-rich and powerful web server that can handle high loads and serve millions of web pages daily.


The Apache Web Server is a sophisticated piece of software with an extensive codebase. While it is challenging to determine the exact number of lines of code, estimates suggest that it contains around 1.5 million lines.

Regardless of the exact number, what matters most is the reliability and performance that Apache Web Server provides. Its solid architecture, extensive feature set, and active community make it an excellent choice for hosting websites of all sizes.

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