Brighten a Dark Photo
Rescue a photo that came out too dark: lift the brightness, restore contrast, and let auto levels rebalance the tones. Live preview, batch support, and nothing leaves your device.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
Lifting an underexposed photo
Indoor shots, backlit subjects and anything taken at dusk tend to arrive darker than what you remember seeing. Raising brightness scales every tone upward, which brings the subject out of the gloom immediately. The catch is that lifting the shadows also lifts the noise hiding in them, and the image can start to look milky as the blacks turn gray.
That is why this page starts you at a moderate brightness increase together with a small contrast boost, rather than brightness alone: the contrast puts a proper black point back under the lifted image, so it reads as brighter rather than washed out.
When to use auto levels instead
If the photo is dark because its tones are bunched into the bottom of the range — a common outcome with phone cameras in low light — Auto levels often beats manual brightening. It measures each color channel, finds the range your image actually occupies, and expands it to fill the full scale, which brightens and restores contrast in one measured step instead of two guessed ones.
Either way, keep an eye on the highlights. Brightening cannot invent detail that the sensor never captured, and once an area reaches pure white it stays white in the export.
A whole batch at once
Photos from one event usually share one exposure problem. Drop the whole set in, correct once, and every image gets the same treatment — then download them together as a ZIP. All of it runs locally in your browser, so even a hundred private photos never touch a server.
Frequently asked questions
- Is my image uploaded to adjust it?
- No. Every adjustment is computed on a canvas inside your browser, so the photo never leaves your device and no server ever sees it.
- How do I make an image black and white?
- Set the “Black & white” slider to 100% — or click the B&W look, which also adds a little contrast so the result does not look flat. Noir goes further with a much harder contrast curve.
- What does inverting the colors do?
- It replaces every color with its opposite, which turns a photo into a negative: white becomes black, blue becomes orange. It is how you read a scanned film negative, and a quick way to flip a screenshot to a dark version.
- What is the difference between brightness and contrast?
- Brightness moves every tone up or down together, so the whole picture gets lighter or darker. Contrast pushes light and dark tones apart, which adds punch — or, in the negative direction, flattens the image into a soft, hazy look.
- What does Auto levels do?
- It measures each color channel of your photo, ignores the extreme 0.4% at each end, and stretches what is left across the full range. Washed-out, hazy or underexposed shots usually snap back to life with a single click.
- Can I adjust many photos at once?
- Yes. Drop in as many images as you like — the settings apply to all of them, and you can download the results individually or together as a single ZIP.
- Will adjusting reduce quality?
- The adjustment itself works at full resolution with no downscaling. Only the re-encode matters: choose PNG for a lossless result, or keep JPG/WebP at a high quality setting.