Darken an Image
Bring down an image that came out too bright, or dim a picture so overlaid text stays readable. Adjust brightness, contrast and a vignette live, entirely on your device.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
Overexposure, within limits
Lowering brightness scales every tone down, which recovers the impression of a properly exposed photo when a shot came out too bright. What it cannot do is recover detail from areas that were completely blown out: once a region was recorded as pure white, darkening it produces flat gray rather than the clouds or the fabric texture that should be there. Photos that are merely too bright respond beautifully; photos that are clipped only partly recover.
Adding a little contrast alongside the darkening usually helps, because it re-separates the tones that bunched together at the top of the range.
Darkening on purpose
Just as often, darkening is a design decision rather than a correction. A hero image behind white headline text needs to be dimmed for the text to be legible, and a background photo in a slide deck should sit back rather than compete with the content. Reducing brightness — sometimes together with lower saturation — is exactly the treatment that produces a usable backdrop.
The vignette slider is worth trying here too: it darkens the corners while leaving the center alone, which both frames the subject and creates darker margins where text and logos usually sit.
Private and batch-ready
Everything is computed inside your browser tab — no upload, no account, no watermark — and the same settings apply to every image you drop in. Export as JPG, PNG or WebP individually, or take the whole set as a single ZIP.
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.