What is Brightness/Contrast Adjuster?

Adjust brightness, contrast, and saturation on any image for free. Changes show up instantly as you move the sliders, and all processing stays private on your device.

Eight sliders cover brightness, contrast, exposure, saturation, vibrance, temperature, hue, and sharpness. Brightness, contrast, saturation, and vibrance run from 0% to 200% with 100% as neutral; exposure mimics a camera stop change; temperature shifts the whole image cooler or warmer; hue rotates the colour wheel from 0 to 360 degrees; and sharpness adds edge crispness with an unsharp mask. Vibrance is a smart saturation that lifts muted colours while leaving skin tones and already-vivid areas alone. One Auto Enhance button reads the image and sets sensible brightness, contrast, saturation, and temperature in a single click, and six presets (Vivid, Soft, Faded, B&W, Warm, Cinematic) drop in a full look. Drop in a PNG, JPEG, WebP, or GIF up to 20 MB and the preview updates as you drag, with a Split View toggle to scrub between the original and the result. Save a single image as a lossless PNG or a smaller JPG, or switch to batch mode to apply the same adjustments to a whole set and download them together as a ZIP.

How to use

1. Upload an image from your device
2. Use sliders to adjust brightness, contrast, and saturation
3. Download the edited image when you are satisfied

When to use

• Brightening photos taken in low light without losing colour fidelity.
• Boosting contrast on a flat scan or screenshot before sharing it.
• Toning down saturation on an over-vivid phone snap for a cleaner look.

Result

Brighten a dark photo by increasing brightness to +30 and contrast to +15 for a clearer result.

FAQ

What's the difference between brightness, contrast, and saturation?

Brightness shifts every pixel lighter or darker by the same amount. Contrast pushes light pixels lighter and dark pixels darker, widening the gap between them. Saturation controls colour intensity — 0% gives greyscale, 200% pushes hues toward neon.

Will my image lose quality after adjusting?

No. Brightness, contrast, exposure, saturation, temperature, and hue use non-destructive CSS filters, while vibrance and sharpness run as a precise pass on the canvas. Either way the download re-renders the original file with the exact same settings, so the saved image stays at full resolution and matches the preview pixel for pixel. Pick PNG for a lossless copy that keeps any transparency, or JPG when you want a smaller file for photos.

What does the Hue slider do?

Hue rotates every colour around the colour wheel by the same amount, from 0 to 360 degrees. Small shifts subtly tint the whole image; large shifts swap colours (red becomes green at 120, blue at 240). It is great for quick colour grading without picking individual hues, and it pairs naturally with saturation for stylised looks.

Are my images uploaded anywhere?

No. Both the preview and the export run on a canvas inside this page, and the file never leaves your device. The 20 MB limit is just to keep the canvas responsive — there is no server quota.

Can it open RAW files from a camera?

Not directly. RAW formats (.cr2, .nef, .arw, .dng) need demosaicing first. Convert them to TIFF or full-quality JPEG in your camera software, then bring that into this tool for fast brightness and contrast tweaks.

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