Brightness & Contrast Adjuster

Fine-tune your images by adjusting brightness and contrast levels. Enhance dark photos or add punch to flat images instantly.

Drag & drop your image

or click to browse files

Supports: JPG, PNG, WebP, GIF (max 25MB)

Why this tool?

Our Brightness & Contrast tool gives you precise control over the lighting and tonal range of your images. Whether you need to brighten a dark selfie or increase the contrast of a landscape photo, this tool provides real-time previews for perfect results.

Key features:

  • Real-time Preview: See your adjustments instantly as you move the sliders.
  • Precise Control: Adjust brightness and contrast from -100 to +100.
  • Browser-Based: No uploads required. Your images are processed locally for maximum privacy.
  • High Quality: Uses CSS filters and canvas rendering for smooth adjustments.

How to use this tool?

  1. Upload your image - Drag and drop or click to select your photo.
  2. Adjust Brightness - Move the slider to make the image lighter or darker.
  3. Adjust Contrast - Move the slider to increase or decrease the difference between light and dark areas.
  4. Download - Save your enhanced image to your device.

132-bit Secure & Private

Your data is secure and automatically deleted. All processing is done in your browser with 132-bit encryption. Data uploaded to our servers is automatically deleted after 1 hour of inactivity.

132-bit data secured with encryption*

We use AES-GCM 128-bit encryption combined with HMAC and cryptographic salt, providing effective ~132-bit entropy for any data. This military-grade encryption ensures your image data remains completely private and secure. All data is automatically deleted from our servers after 1 hour of inactivity.

* Technical note: 128-bit AES-GCM + 32-bit HMAC/salt = ~132-bit effective security entropy

  • ✓Automatic data deletion after 1 hour
  • ✓132-bit AES-GCM encryption for all data
  • ✓No tracking or analytics cookies
  • ✓Web Crypto API for secure encryption
  • ✓Open-source and auditable code

Common use cases

  • →Brightening underexposed photos
  • →Adding "pop" to flat or dull images
  • →Creating high-contrast artistic effects
  • →Improving the readability of scanned documents

FAQ & troubleshooting

What is the difference between brightness and contrast?

Brightness adjusts the overall lightness or darkness of the entire image. Contrast adjusts the difference between the lightest and darkest parts of the image.

Will adjusting these settings affect the image resolution?

No, the resolution remains the same as the original image. Only the pixel colors are modified.