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ToolNest AI
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Brightness & Contrast

Adjust image brightness, contrast, exposure and gamma online for free with real-time preview.

brightness_6

Drop an image or click to browse

JPG · PNG · WebP · GIF · BMP · TIFF · AVIF

About Brightness & Contrast

Fine-tune brightness, contrast, exposure, gamma, highlights and shadows on any image entirely in your browser. All six adjustments are applied through a single precomputed lookup table for instant live preview — no server uploads required. Drag the split-view divider to compare before and after, then export as JPG, PNG or WebP. Supports JPG, PNG, WebP, GIF, BMP, TIFF and AVIF.

Frequently Asked Questions

Upload your image, drag the Brightness slider to the right to increase brightness (or left to darken), then click Apply Changes and download the result.

Yes. The Contrast slider boosts or reduces the difference between the light and dark tones in the image. Moving it right increases contrast; moving it left reduces it.

Brightness shifts all pixels by a fixed amount. Exposure is a multiplicative shift (like opening/closing a camera aperture). Highlights affects only bright areas and Shadows affects only dark areas, giving you tonal control without touching the mid-range.

For PNG export, quality is lossless. For JPG and WebP you can set the compression quality (1–100). The adjustments themselves are lossless integer operations applied via a lookup table.

Yes. All adjustments run in the browser using the Canvas 2D API. No image data leaves your device.

Yes, fully free with no account required and no usage limits.

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