Image Contrast Adjuster
Upload an image, adjust contrast, preview the result, and download the processed version. This is useful for improving readability in screenshots, making scans look clearer, or softening overly harsh images.
Image Contrast Adjuster tool
Current adjustment: 0
Current quality: 0.90
Negative values reduce contrast for a softer look. Positive values increase separation between dark and light areas.
Privacy: contrast adjustment runs locally in your browser. No image is uploaded, stored, or transmitted.
Learn more about images
Understanding formats and optimization helps you get better results when converting or editing images.
This tool adjusts contrast by remapping pixel values around the midpoint. Increasing contrast pushes darker pixels darker and lighter pixels lighter, while decreasing contrast pulls values closer together.
- Higher contrast: stronger shadows and highlights
- Lower contrast: softer transitions and flatter tone
- Moderate settings: usually best for screenshots and document images
Examples
- Increase contrast in a washed-out screenshot
- Reduce contrast in a harshly lit photo
- Improve readability in scans and receipts
FAQ
- What does contrast adjustment do?
It increases or decreases the difference between light and dark areas in the image.
- When should I increase contrast?
Increase contrast when an image looks flat or washed out and needs more separation between shadows and highlights.
- When should I reduce contrast?
Reduce contrast when shadows are too harsh, highlights are too intense, or you want a softer appearance.
- Is my image uploaded anywhere?
No. Everything runs locally in your browser.
- Can I export the adjusted image?
Yes. You can export the current result as PNG, JPEG, or WebP.