Rain On Window Simulator
Experience the calming beauty of rain falling on a window pane. This simulator creates a realistic rainy atmosphere with water droplets sliding down glass, gentle rain sounds, and optional thunder and lightning — all rendered in real-time in your browser.
Whether you need to focus on work, unwind after a long day, or simply enjoy the cozy feeling of watching rain from indoors, this simulator provides a serene environment with customizable settings to match your mood.
How to Use
The rain starts automatically when you open the app. Move your mouse or tap the screen to reveal the controls.
Controls
Play/Pause
Volume
Intensity
Thunder
Fog
Timer
Scene Backgrounds
Choose from four built-in scenes at the top of the screen to set the perfect atmosphere:
Dark
Minimal dark background for pure focus on the rain
City Night
Blurred city lights and neon reflections
Forest
Tree canopy silhouettes with soft green tones
Street Lamp
Warm lamplight with wet street reflections
Custom Background
Click the image icon next to the scene buttons to upload your own photo. The image will be displayed behind the rain with a subtle blur and darkening effect. Click the trash icon to remove it and return to the default scene.
Features
Realistic Rain Rendering
Rain drops fall with a natural parallax depth effect — distant drops appear smaller and slower, while nearby drops are larger and faster. Each drop follows a slight wind angle for added realism. When drops reach the bottom, they burst into tiny splash particles.
Background Layer
- Smaller size
- Slower fall speed
- Subtle appearance
Foreground Layer
- Larger size
- Faster fall speed
- Prominent with splash effects
Glass Droplets
Water droplets sit on the glass surface and slowly accumulate rain water. Once heavy enough, they begin sliding down, wobbling due to surface tension. Nearby droplets merge together to form larger ones, leaving thin water trails behind them.
Immersive Audio
Rain sounds are generated procedurally using the Web Audio API — no pre-recorded loops. The audio adapts to your selected intensity, from gentle patter to heavy downpour. Thunder rumbles with a natural delay after lightning flashes, simulating the distance of the storm.
Scene Backgrounds
Four carefully crafted scene backgrounds set the mood: a dark minimalist view, city lights at night, a misty forest, or a solitary street lamp. You can also upload your own image to create a personalized atmosphere.
Sleep and Focus Timer
Set a timer for 30 to 120 minutes. When the timer expires, the audio gently fades out and the rain stops — perfect for falling asleep or timing a focus session.
Set Duration
Choose 30-120 minutes
Adjust Settings
Select intensity and scene
Relax
Auto-fade when time ends
Frequently Asked Questions
Why is there no sound when I open the app?
Modern browsers require a user interaction (click or tap) before playing audio. Simply click anywhere on the screen or interact with any control to start the audio.
Can I use this for sleeping?
Yes. Set the timer to your desired duration (30-120 minutes), adjust the intensity to Light or Moderate, and the app will automatically fade out and stop when time is up.
Will my uploaded background image be sent to a server?
No. Your image is processed entirely in your browser and stored locally. It is never uploaded to any server.
Why does the rain look different at different intensities?
Each intensity level changes the number of rain drops, their speed, the amount of splash particles, and the density of glass droplets. The audio also adjusts to match — heavier rain produces louder, deeper sounds with more frequent individual drop impacts.
Can I use this on mobile?
Yes. The app is fully responsive and works on mobile devices. Tap the screen to show controls. For the best experience, use fullscreen mode.
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