Headless software (e.g. “headless Linux”,[1]) is software capable of working on a device without a graphical user interface.[2]Such software receives inputs and provides output through other interfaces like network or serial port and is common on servers and embedded devices.
The term “headless” is most often used when the ordinary version of the program requires that a graphics card or similar graphical interface device be present. For instance, the absence of a graphic card, mouse or keyboard may cause an initialization process that assumes their presence to fail, or the graphics card may be relied upon to build some offline image that is later served through network. Many apps can run “headlessly”, including VLC Media Player.[3]
A headless computer (for example, and most commonly, a server) may be missing many of the system libraries that support the display of graphical interfaces. Software that expects these libraries may fail to start or even to compile if such libraries are not present.[4]
Headless agents and games
Video games typically use a headless server for simulation of a multiplayer environment.
A headless server does not render any visuals, and there is nobody playing on it locally. This enables a dedicated server to focus on gameplay logic and moderating incoming information from clients, making the most of its resources for hosting a game.
— Unreal Engine documentation[5]
Additionally, headless clients can be used to automate testing, play as NPC AIs, or integrate with an external artificial human companion system.
Headless simulations of games are used to accelerate the rate of gradient descent in machine learning, for example, by enabling large batches of simulation to be run in parallel.[6]
Headless rendering
When no physical screen is present, software can still be used to render images for many applications.
In a headless website configuration, the frontend presentation is server-side rendered.
Headless rendering is also used in films and generation of synthetic data.[7] For example, Blender provides command-line rendering.[8]
Headless CMS
Headless content management systems (headless CMS) separate the storage and administration of content from its presentation, exposing content to front-end applications via an API, rather than rendering it directly.[9][10]
Examples of this include Odoo and Microsoft Dynamics 365. In 2026, Salesforce launched Headless 360, which opened its CRM platform via API and the Model Context Protocol, allowing users and AI agents to access data through third-party tools.[11]
See also
- OS-level virtualization
- Secure Shell (SSH)
- Headless browser
- Headless computer
- Headless content management system
- Headless commerce
- Compositing window manager
References
- ^ Clarification of “headless Linux”
- ^ “What is a headless server? | Definition from TechTarget”. WhatIs. Retrieved 2026-06-18.
- ^ Aguilar, Jorge A. (2025-12-27). “3 popular apps I always run in headless mode so they don’t clutter my desktop”. How-To Geek. Retrieved 2026-06-18.
- ^ Michael Wiles (2010) Headless Build, who needs it?
- ^ “Setting Up Dedicated Servers”.
- ^ Frans, Kevin; Isola, Phillip (2022). “Powderworld: A Platform for Understanding Generalization via Rich Task Distributions”. arXiv:2211.13051 [cs.AI].
- ^ “RenderGarden accelerates After Effects renders by Mark Christiansen – ProVideo Coalition”. 2018-01-16. Retrieved 2026-06-18.
- ^ “Command Line Rendering”.
- ^ Gienow, Michelle (2018-01-18). “Don’t Call Contentful’s Content Infrastructure a ‘CMS’“. The New Stack. Retrieved 2026-06-18.
- ^ Wiggers, Kyle (2022-11-15). “Contentstack raises $80M to grow its headless CMS platform for the enterprise”. TechCrunch. Retrieved 2026-06-18.
- ^ Nunez, Michael (2026-04-16). “Salesforce launches Headless 360 to turn its entire platform into infrastructure for AI agents”. VentureBeat. Retrieved 2026-06-18.