Drag and drop or click to upload a JPG, PNG, or WEBP file. The original image is displayed immediately at full resolution.
Adjust Image Brightness
Brighten or darken any photo with a simple slider. Also adjust contrast and saturation in the same step. Free, no signup, no watermark.
How to Adjust Image Brightness Online
Move the slider right to brighten, left to darken. Values range from -100 to +100. Adjust Contrast and Saturation alongside for a balanced result.
Click Download to save the result as a PNG at the original pixel dimensions. No watermark added.
When to adjust image brightness
Underexposed photos from indoor shots, evening lighting, or shadows often need a brightness boost to look natural. Overexposed photos taken in direct sunlight may need darkening to recover detail. A brightness adjustment is one of the quickest fixes in photo editing and works well for profile photos, product images, and document scans.
Brightness vs exposure
Brightness adjustment adds or subtracts a fixed amount from every pixel. This is simple and fast but can clip highlights or crush shadows if pushed too far. For more precise control, combine brightness with contrast: brighten the image, then bring contrast up slightly to restore definition in mid-tones.
Common use cases
Fixing underexposed phone photos, brightening product images for listings, lightening dark scanned documents, preparing images for presentations, and correcting photos taken in poor lighting for social media posts.