What is a light screen?

A light screen is a tool that turns your display into a fullscreen light source. LightScreen lets you instantly fill your screen with any color — white, red, blue, warm light, and more — to use as a flashlight, ambient lighting, or reading light. It works directly in your browser with no download needed.

LightScreen is a free light screen tool online — an alternative to apps like BrightScreen. It turns your browser into a portable light screen by displaying any color in fullscreen mode. Use it as a flashlight, ambient light for photography, ring light online substitute, screen night light, reading light screen, or monitor test tool. No app to install — just open and use.

How do I use LightScreen as a flashlight?

Simply click any color on the home page and your screen will immediately fill with that color at full brightness. Press F for quick fullscreen or use the Enter Fullscreen button. Adjust brightness with the slider at the bottom of the screen.

Is LightScreen free to use?

Yes, LightScreen is 100% free with no downloads, sign-ups, or installations required. It works directly in any modern web browser on desktop and mobile.

Can I adjust the brightness of the screen light?

Yes. While in fullscreen mode, use the brightness slider at the bottom of the screen to adjust from 0% to 100%. Your preference is remembered for the next session.

What is the breathing mode?

Breathing mode creates a smooth, pulsing color animation that cycles through the color spectrum. It is great for relaxation, meditation, or creating ambient mood lighting.

How do I exit fullscreen mode?

Press ESC on your keyboard, click the exit button in the top-left corner, or tap anywhere on mobile to toggle controls. You can also press F to exit.

Does it work on mobile phones?

Yes. LightScreen works on all modern mobile browsers. Tap any color to enter fullscreen light mode. On mobile, tapping the screen toggles the controls visibility.

What colors are available?

LightScreen offers classic colors including White, Light Pink, Warm Light, Cool Light, Red, Green, Blue, Purple, Pink, Orange, Yellow, Black, plus scene modes like Breathing and Photo Fill.

Can I use a custom color?

Yes. While in fullscreen mode, click the color picker button in the bottom-right corner to select any color from millions of possibilities.

Does LightScreen work offline?

Once loaded, LightScreen uses localStorage to save your preferences and works without an internet connection. The initial load requires internet access.

What is the best color for reading?

White or warm light (2700K–3500K equivalent) works best as a reading light screen. White provides maximum clarity, while warm light reduces blue light and is gentler on your eyes before sleep.

Can I use LightScreen for stargazing?

Yes! Red screen light is the gold standard for stargazing and astronomy because red light preserves your dark-adapted night vision. Open LightScreen, tap Red Screen, turn brightness down, and place your device face-down nearby. Your telescope and star charts will be visible while your night vision stays intact.

How do I test my monitor for dead pixels?

Open LightScreen and select White Screen in fullscreen mode. Look closely at the entire display for any dark spots. Then switch to Black Screen and repeat. Check each primary color (Red, Green, Blue) as well. Any pixel that looks different from the surrounding color may be a dead pixel.

Can LightScreen replace a ring light online?

Yes for many close-up tasks. Photo Fill White turns your screen into a soft, diffused fill light — a free ring light online alternative for selfies, product shots, and video calls. Position the screen facing you and adjust brightness as needed.