Auto Brightness & Contrast

Upload your photo — drag it in or click to browse.

Auto Adjust or fine-tune — click "Auto Adjust" for an instant correction, then tweak the Brightness and Contrast sliders if you want. Use Compare to see before and after, and Reset to undo.

Download — click "Download Enhanced Image" to save the result. ```

It uses histogram equalization. The tool looks at the spread of light and dark tones in your photo, finds the darkest shadows and brightest highlights, and stretches the range between them. That brightens an underexposed image and adds contrast to a flat one, recovering detail — all in a single click, with no settings to configure.

No. All the processing happens in your browser on your own device, so your photo is never uploaded. Nothing is stored once you close the tab. That keeps personal photos and sensitive documents private, and it makes the adjustment instant because there's no waiting for a server.

Upload it and click Auto Adjust — for most underexposed photos that's all you need. If it's still too dark or now too bright, nudge the Brightness slider, and add a little Contrast to restore depth. Use the Compare button to check the result against the original before downloading.

That can happen with photos that are meant to be dark — a night scene or a moody, artistic shot — because the auto correction assumes a full tonal range. Just click Reset to undo it, then use the manual Brightness and Contrast sliders to set the look yourself. Auto Adjust is meant as a quick starting point you can refine.

Yes. There are separate Brightness and Contrast sliders, each from −100 to +100, so you have full manual control whether or not you use Auto Adjust. Lower the brightness for an overexposed photo, raise contrast to make a flat image pop, and watch the preview update live as you drag.

Use the Compare toggle. It switches between your adjusted version and the original so you can judge exactly how much the correction changed and whether it's an improvement. It's the easiest way to make sure you're enhancing the photo, not overdoing it, before you download.

No. Brightness and contrast adjustments don't change the resolution — your photo keeps its dimensions and detail. Saving as a lossy format like JPG re-encodes the file, so keep the quality high. Extreme corrections can clip detail in the very brightest or darkest areas, so moderate adjustments look best.

This tool is focused on one job — fixing brightness and contrast quickly, with a one-click auto option. The Photo Enhancer adds more controls, including exposure, saturation, warmth, highlights, shadows, and sharpen. Use this page for a fast lighting fix; use the Photo Enhancer when you want to fine-tune more aspects of the photo.

You can upload common image formats like JPG, PNG, and WebP, adjust them, and download the enhanced result. If your photo is in a format the tool doesn't accept — such as HEIC from an iPhone — convert it first with the HEIC to JPG tool, then bring it here.

Yes. It runs in your phone's browser with nothing to install, so you can brighten and fix a photo's contrast on Android or iOS, adjust with touch, and download the result. It's handy for quickly rescuing a dark photo before you share it from your phone.

No. There's no cap and no account needed — adjust as many photos as you like, one at a time. Because everything runs locally, the only practical limit is your device's memory, so very large images use more resources but everyday photos are handled instantly.

Yes, completely free with no account, no watermark, and no paywall. The auto adjustment and manual sliders are all available at no cost, and because the tool runs in your browser there are no usage limits or hidden fees.