Equalize Image Area
Upload an image and select a rectangular area to apply histogram equalization. Only the selected region will be enhanced while the rest remains unchanged.
Click to upload or drag and drop an image
Supports PNG, JPEG, GIF, WebP, BMP
Why use this tool?
Histogram equalization enhances contrast by redistributing pixel intensities. This tool lets you apply it selectively to specific areas of an image, perfect for enhancing dark regions without affecting well-exposed areas.
- Selective enhancement — target only the areas that need improvement.
- Adjustable strength — control the intensity of the effect.
- Interactive selection — draw a rectangle directly on the image.
- Live preview — see changes before downloading.
- Privacy — all processing happens in your browser.
How to use
- Click the upload area or drag and drop an image.
- Click and drag on the image to select a rectangular area.
- Adjust the strength slider if needed.
- Click "Apply Equalization" to enhance the selected region.
- Click "Download Image" to save the result.
Frequently Asked Questions
Yes, completely free with no sign-up required.
PNG, JPEG, GIF, WebP, and BMP.
No. Everything runs client-side.