Decrease Image Brightness
Tone down photos that are too bright or overexposed, or darken a background image so text on top is easier to read.
Free · No sign-up · Files stay on your device
How to use Decrease Brightness
- 1Add your images.
- 2Drag the brightness slider to the left to darken them.
- 3Click "Apply" and download the results.
Features
- Adjust with a single slider from -100 to +100
- Batch process up to 100 images
- Keeps the original format and size
- Transparency in PNG and WebP is preserved
- Private: images stay on your device
When to darken an image
Darkening fixes overexposed photos taken in bright sun, and it is the standard trick for hero images and slide backgrounds: a darker image makes white text on top of it far more readable.
Darkening vs. lowering contrast
Darkening shifts every pixel toward black. Lowering contrast pulls light and dark tones toward the middle. For overexposed photos, darken first, then adjust contrast if needed.
Frequently asked questions
Can I recover blown-out highlights?
Not completely. Pure white areas contain no detail, so darkening turns them grey rather than restoring what was lost.
How dark should a background image be for text?
A reduction of 40–60 usually gives white text enough contrast. Use our Color Contrast Checker to confirm readability.
Are my images uploaded?
No. All processing happens in your browser.