Adjust the brightness, exposure, contrast and saturation of an image entirely in your browser and save the result as a PNG. When a photo or AI-generated image is a little too dark, washed out, or flat, you can fix it quickly with four sliders instead of opening a heavy image editor. Brightness lightens or darkens the whole image uniformly. Exposure does the same but works in photographic stops, scaling brightness multiplicatively over a ±2-stop range — that makes it better for natural, fine tonal tweaks than plain brightness (the two are multiplied together when applied). Contrast widens the gap between light and dark areas to add punch. Saturation controls colour intensity: 0 gives black & white, 100 leaves it unchanged, and higher values make colours more vivid. Returning any slider to its default (100 for brightness, contrast and saturation; 0 for exposure) neutralises that effect. The adjustments are applied with the browser's canvas filter so they stay fast and responsive; the preview is scaled to fit your screen (up to 2048px on the long side), but the saved PNG is exported at the original pixel size. You can load images by dropping, clicking to choose, or pasting from the clipboard. All computation happens in your browser — the image is never sent to any server or API, so it's safe to use even where uploading files is not allowed.