Is Adjust Brightness & Contrast free to use?

Yes, completely free. No signup, no watermark, no file limit.

Is Adjust Brightness & Contrast safe? Do my files get uploaded?

No upload required. All adjustments happen in your browser using the Canvas API. Your images never leave your device.

Does it work on mobile, iPhone, and Android?

Yes. The tool works in any modern browser including Safari on iPhone and Chrome on Android.

What's the difference between brightness and contrast?

Brightness shifts all pixels lighter or darker by the same amount. Contrast pushes lighter pixels lighter and darker pixels darker, increasing the spread between shadows and highlights without changing the midtone.

Can I undo the changes if I move the slider too far?

Yes. The live preview shows the result in real time. Slide back to 0 to remove any adjustment before downloading, and the original is preserved on your device regardless.

Adjust Brightness & Contrast

Adjust brightness and contrast online for free. Fine-tune image exposure with live preview — in-browser, no upload, no signup.

Drop an image here

JPG, PNG, or WebP

Max 100 MB per file

Last updated May 2026

Pro Tip

For underexposed (dark) photos, increase brightness first, then adjust contrast to add depth. For washed-out photos, increase contrast to make colors pop.