Adjust Image Brightness & Contrast Online Free | ImagePlumber
Increase or decrease photo brightness and contrast online for free with real-time preview and 1-click auto-enhancement in your browser.
How It Works: Easy 3-Step Guide
- Upload Photo: Drop your photo into the brightness & contrast tuner.
- Balance Lighting: Adjust exposure, brightness, and contrast sliders for optimal clarity.
- Save Enhanced Photo: Download the balanced image in lossless PNG or JPEG.
Key Features & Processing Details
- Real-time brightness & contrast adjustment sliders
- 1-Click Auto-Enhance histogram stretch
- Split Before/After comparison view
- 100% Client-side sandbox processing
Frequently Asked Questions (FAQ)
What does the Auto-Enhance button do?
It analyzes the minimum, maximum, and average luminance distribution of your photo, then applies mathematical dynamic range stretching and contrast optimization.
How does sharpness enhancement work?
It computes a 3x3 unsharp masking convolution kernel that calculates local contrast gradients to enhance fine edges without creating color noise.