Free Tool
Adjust Image
Brightness for Free.
Brighten a dark screenshot or tone down an overexposed photo with one slider. Processed in your browser, never uploaded.
Free Tool
Brighten a dark screenshot or tone down an overexposed photo with one slider. Processed in your browser, never uploaded.
Join 5M+ users who rely on Zight to increase their productivity
Free Image Tool
Drag your image here or click to browse
PNG, JPG, WebP, or GIF images
Is this tool working for you? Let us know
How It Works
01
Upload an Image
Drop in the photo or screenshot that's too dark or too bright.
02
Drag the Slider
Slide brightness up or down and watch the preview update live.
03
Download
Download the adjusted image as a PNG.
Quick Fix
Most brightness problems don't need a photo editor — one slider gets a too-dark screenshot ready to share in seconds.
FAQ
Yes, completely free. No account or credit card is required.
No. This tool runs entirely in your browser — your files are processed on your own device and never uploaded to a server.
Yes — drag the slider below 100% to darken an overexposed image.
No, only brightness. For heavier corrections, use a full editor — this tool is built for the quick fix.
No account needed. Images never leave your browser.