# Brighten dark photos

> Free image brightener that lightens dark JPEG, PNG and WebP photos with Natural, Shadow lift or Backlit styles, with a live before-and-after preview, right in your browser. Nothing is uploaded.

Canonical: https://trysecretgrid.com/tools/image-brightener
Last updated: 2026-11-06

Lighten dark or backlit photos with Natural, Shadow lift or Backlit, and compare before and after.

**Runs in your browser. Nothing is uploaded.** Your files are processed on this device and never leave it. You can even switch off your internet once the page has loaded.

Formats: JPEG, PNG, WebP. This is an interactive tool: open [the page](https://trysecretgrid.com/tools/image-brightener) in a browser to use it.

## How it works

1. Open a dark photo. It's decoded in your browser; nothing is uploaded.
2. Pick a style: Natural for an overall lift, Shadow lift for dim scenes, Backlit for faces against a bright window or sky.
3. Adjust the strength while you watch the live preview, and tap Compare to see the original.
4. Save the brightened copy at full size in its original format.

## Questions

### Which style should I use?

Natural brightens everything evenly. Shadow lift brightens only dark areas, so skies and lights stay as they are. Backlit lifts shadows strongly and softens bright highlights, which suits silhouetted faces.

### Will colours change?

No. Each pixel's red, green and blue are scaled together, so colours keep their hue while getting brighter.

### Is the photo resized or compressed?

It's saved at its full original size in the same format. JPEG and WebP are re-encoded at high quality; PNG stays lossless.

### Is anything uploaded?

No. All processing happens on your device, and the saved photo has no metadata or location.

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