Dark Mode Unleashed: How to Switch ChatGPT to Black Easily!

Dark Mode Reduces Eye Strain

Dark mode, a feature that has gradually become a staple on everything from smartphone interfaces to professional software, primarily aims to reduce eye strain, particularly in low-light conditions. This benefit, long suggested by users, is now gaining some recognition in scientific literature.

Experimental studies have indicated that using negative polarity (light text on a dark background) can lessen eye strain, especially in dim environments. A 2019 study conducted by researchers at the University of Central Florida particularly noted that dark mode decreases visual fatigue and enhances visual acuity when using augmented reality screens in low-light situations. Moreover, a study published in April 2025 in The International Journal of Environmental Research and Public Health also found that dark mode could slightly reduce eye dryness during prolonged tablet use compared to light mode. Dark mode furthermore reduces the emission of blue light, which is well known for its impact on sleep and eye strain. Less light emission also means reduced glare, which can enhance comfort during nighttime use.

However, the advantages of dark mode can vary significantly depending on the context. In well-lit environments, several studies (including one by Piepenbrock et al., 2014) have found that reading is faster and more accurate on a light background. Thus, positive polarity (dark text on a light background) is often better for demanding cognitive tasks such as extensive reading or note-taking.

How to Enable Dark Mode on ChatGPT

Like many websites and applications, ChatGPT defaults to a light interface to prioritize readability. However, a dark mode option is available in the settings. Here’s how to activate it on a mobile device:

• Open the ChatGPT app,
• Tap the menu in the upper left corner of the app,
• Tap on your profile icon to open Settings,
• Select Personalization,
• Tap on Display,
• Check Dark.

Here’s how to activate it on the web:

• Open ChatGPT,
• Click on your profile icon, located in the upper right corner of the interface,
• Go to General,
• In Theme, click on the dropdown menu and select Dark.