Fine-tune brightness, contrast, and saturation with live preview — all processing is local, nothing is uploaded.
or drag & drop it here
PNG, JPG, WebP supported
Image Brightness & Contrast is a free online image tool that lets you fine-tune brightness, contrast, and saturation with live preview — all processing is local, nothing is uploaded without uploading files to any server. Designers, photographers, bloggers, and social media managers rely on browser-based image tools to make quick edits without launching heavy desktop software. Your images never leave your device — all processing happens locally using modern browser APIs.
Brightness uniformly adds or subtracts a value from every pixel channel, making the whole image lighter or darker without preserving tonal relationships. Exposure is a photography/RAW term that multiplies pixel values (like doubling stops of light), which better preserves highlights and shadows. This tool uses additive brightness, which is fast and ideal for quick corrections on compressed images (JPEG/PNG).
Contrast stretches or compresses the tonal range. This tool uses the standard formula: factor = (259 × (c + 255)) / (255 × (259 − c)), then applies pixel = factor × (pixel − 128) + 128 to each RGB channel. Positive contrast makes darks darker and lights lighter; negative contrast brings everything toward middle gray.
Saturation uniformly adjusts the intensity of all colors — boosting it makes every color more vivid; reducing it makes the image gray. Vibrance (used in professional editors) is smarter: it boosts only muted colors while protecting already-saturated areas and skin tones. This tool uses full saturation via HSL conversion, which is perfect for most use cases.