Flashlight
Turn your screen into a bright light source with color and brightness controls.
Category: Life Tools
When to use?
When you need light in the dark, turn your phone or PC screen to max brightness as a makeshift flashlight.
How to use
- Press the power button to turn on the light.
- Adjust color (white, warm yellow, red) and brightness.
- Use the fullscreen button to fill the entire screen.
Input Explanation
Adjust settings using the color selector and the brightness slider.
Calculation Basis
Uses browser-side CSS background styling and fullscreen API to project maximum brightness from your display.
Usage Examples
- Emergency lighting - Use during power outages or in dark places.
- Night reading - Red mode reduces eye strain when reading in the dark.
Examples
- Select warm yellow mode at 50% brightness to use as a soft bedside lamp
- Turn on emergency white mode in a dark room to locate misplaced keys
Cautions
- Prolonged usage at high brightness levels may increase battery consumption and heat up your device.
FAQ
Does it turn on the camera flash?
No — it only changes screen color and brightness. Camera flash control is not supported in browsers.
How do I exit fullscreen?
Press the ESC key or click the exit-fullscreen button.
Related Tools
- Spirit Level - Measure tilt using your device's orientation sensor to check horizontal and vertical alignment.
- Decibel Meter - Measure ambient noise level (dB) in real time using your microphone.
- Online Metronome - Set BPM and hear precise beats with visual feedback using Web Audio API.
- Fuel Cost Calculator - Estimate fuel cost from driving distance, fuel economy, and fuel price.
- Electricity Bill Calculator - Estimate a monthly electricity bill from power consumption in kWh.
- Battery Runtime Calculator - Estimate runtime from battery capacity in mAh and device current draw.