How to use this tool
Choose an image and adjust brightness and contrast from -100 to 100. Zero leaves that adjustment unchanged. Generate a preview to inspect the result. Download the result when ready.
Good to know
PNG, JPEG and browser-supported WebP inputs only. Maximum input file: 20 MB; decoded images and outputs: 16 million pixels and 8,192 pixels per side. Animated WebP is flattened to a still frame. Browser decoding may apply image orientation; preview the result. Metadata and animation are not preserved, and colors may change during browser conversion. JPEG removes transparency using white. Export support depends on the browser and is checked before download. Compression is lossy and may produce a larger file. All processing stays on your device; images are not uploaded or saved by the site. Brightness applies an additive channel offset; contrast is applied around mid-gray. These adjustments operate on sRGB channels.