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Photo

Style

Brightness

40%

Contrast

0

Runs in your browser. Your photos are not uploaded.

Image Brightener

Brighten a dark photo with a free image brightener: three styles, live preview, no upload.

Which image brightener style fits your photo?

Each style bends the tone curve differently, and the same Brightness value gives a different result in each. Pick by what is wrong with the photo.

NaturalShadows onlyExposure
What it liftsThe midtonesOnly the darkest areasEverything, like adding light
Black and white pointsStay where they areHighlights barely moveHighlights roll off softly instead of clipping hard
Pick it forA photo that is dim overallA backlit subject with a sky you want to keepA photo that is underexposed across the frame
Watch out forDark noise gets lifted tooMidtones stay as they wereBright areas can lose detail
Mean brightness, one selfie at 40 %106 to 141 of 255106 to 123 of 255106 to 151 of 255

How to brighten an image with this tool

Three steps, no sign-up.

  1. 1

    Upload a dark photo

    Drop in a JPG, PNG or WebP up to 50 MB, one photo at a time. It is opened in your browser, not sent anywhere. Phone shots taken indoors and at night are the usual candidates.

  2. 2

    Choose a style and an amount

    Start with Natural at 40 %, then move Brightness until faces and shadow detail read clearly. Use Contrast from -50 to 50 if the result looks flat. The preview follows the controls live.

  3. 3

    Compare and download

    Hold to see the original and check what changed. Download renders the full photo, up to 8000 px on the long side, and a JPG stays a JPG. Other formats save as PNG.

Why use this image brightener

A tone curve you control, running on your own device.

Nothing is uploaded

The photo is decoded and brightened on your device and never leaves it. There is no account, and the tool does not count how many photos you brighten.

Three curves, not one slider

Natural, Shadows only and Exposure fix different problems, so a backlit face and a dim room each get the right lift. The Contrast control is applied after the curve.

Fast on a normal laptop

On an M-series Mac in Chrome, a 4000 x 5333 photo rendered for download in 0.25 seconds, and the preview in 0.15 seconds. Speed on your device will vary with its size and power.

A plain tone curve

It changes brightness values, not content. It does not remove noise or bring back highlights that were already blown out.

Free, no sign-up

Open the page, brighten, download. No watermark is added to the file.

Compare before you save

Hold to see the original at any time. The preview is rendered at 1600 px on the long side, so you judge the result before the full-size download.

Frequently asked questions

No. The photo is processed in your browser and never leaves your device. Only the page itself loads from our server, and the free image brightener needs no account.

An image brightener raises the lightness of a dark or underexposed photo so faces, shadows and details become visible. Here it does that with a tone curve in your browser, and you choose how the curve behaves.

Upload the photo, pick a style, move Brightness until it looks right, then press Download. The tool is free to use, with no sign-up, no watermark and no limit on photos.

It changes pixel values, so noise hiding in dark areas shows more once lifted. A JPG is saved again at quality 0.92, which is high but not lossless. Highlights that were already pure white stay white, since a tone curve cannot recover them.

Natural for a photo that is dim overall, Shadows only when a subject is dark but the sky or windows are fine, Exposure when the whole frame is underexposed. The table above shows how each one moves the brightness. If you are unsure, start with Natural, then switch style and compare using Hold to see the original.

No. The adjustment applies to the whole photo, and there is no brush or mask. Shadows only is the closest option, since it leaves bright areas nearly as they were and opens the dark ones.

No, one photo at a time, and there is no batch mode. Settings are not saved between photos, so note your style and amount if you want a set of photos to match.

Lifting a dark photo lifts its noise too. Lower the amount, switch to Shadows only, or add a little Contrast to bring back depth. This tool does not remove noise.

This image brightener only changes light and contrast with a fixed curve, so the content stays as it was. An AI enhancer redraws detail and can change the picture. For that, try the photo enhancer.

JPG, PNG and WebP up to 50 MB. A JPG downloads as a JPG, and PNG and WebP download as PNG. The saved file is rendered from the full photo, up to 8000 px on the long side.

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