Adjust Brightness

Brighten dark photos or darken overexposed images. Drag to adjust, see instant p...

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What You Can Do

Range Slider - -100 to +100
Gradient Track - Visual feedback
5 Presets - Quick adjustments
+10 / -10 - Fine control
Compare - Before/after
PNG Export - High quality

Why Use Adjust Brightness?

Drag to Adjust

Slide from -100 (darker) to +100 (brighter). The gradient track shows you the full range visually.

Instant Preview

See brightness changes in real-time as you drag. No waiting, no button clicks needed.

Nothing Uploaded

Your photos never leave your device. Everything runs in your browser using Canvas API.

5 Quick Presets

Tap Darker, Slight Dark, Original, Slight Bright, or Brighter for instant common adjustments.

Side-by-Side Compare

See original and adjusted thumbnails together. Know exactly what changed.

Works on Mobile

Fully responsive interface. Floating download button stays accessible while you adjust.

Popular Uses

Dark Indoor Photos

Brighten photos taken without flash or in dim rooms.

Overexposed Outdoor Shots

Tone down photos taken in harsh sunlight.

Scanned Documents

Lighten dark scans or darken faded documents.

Screenshots

Adjust screenshot brightness for better readability.

How It Works

1

Upload Your Photo

Drag an image onto the upload area or tap to browse. Works with PNG, JPG, GIF, WebP, and most formats.

2

Drag the Brightness Slider

Move left to darken, right to brighten. Use presets for quick adjustments or +10/-10 buttons for fine control.

3

Download Your Result

Hit Download to save as PNG. The filename includes your brightness value (e.g., photo-brightness+30.png).

Quick Tips

Start Small

Begin with +20 or -20 and adjust from there. Small changes often make a big difference.

Use the Compare Panel

Glance at the original thumbnail while adjusting. Easy to lose perspective on how much you've changed.

Avoid Extremes

Values beyond ±60 often lose detail. If you need more, your photo may need professional editing.

Frequently Asked Questions

Upload your photo and drag the brightness slider to the right (positive values). Start with +20 to +40 for slightly dark photos. For very dark photos, try +60 to +80. The preview updates instantly so you can find the perfect level.
Yes! Drag the slider to the left (negative values) to darken overexposed photos. Try -20 to -40 for mildly overexposed images. The darker presets are quick shortcuts for this.
Brightness adds or subtracts a fixed amount to all pixels equally - simple and predictable. Exposure simulates camera settings and affects shadows, midtones, and highlights differently. This tool uses brightness for quick, straightforward adjustments.
The adjustment itself doesn't reduce quality. However, extreme values (+80 or higher) can wash out details in highlights, and very negative values can crush shadow details. For best results, use moderate adjustments.
No. Everything happens in your browser using the HTML5 Canvas API. Your photos never leave your device. We physically cannot see your images because nothing is transmitted.
Absolutely. The interface is fully responsive. On mobile, the slider works with touch, and the download button floats at the bottom for easy access.
Quick Adjust buttons let you nudge brightness in small increments. Useful when you're close to the right level and want to fine-tune without overshooting on the slider.
The filename includes your brightness adjustment value so you can identify different versions later. For example, 'photo-brightness+30.png' means you increased brightness by 30%.
This tool answers many common search variations including: increase brightness of image, make image brighter, lighten dark photos online free. Whatever phrasing you used to find us, you're in the right place.

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