Lighten Image
Lighten Image — instantly, in your browser, with nothing uploaded.
Drag & drop your image here, or click to choose. Everything runs in your browser — nothing is uploaded.
Under-exposed photos, scans and screenshots taken in a dark room can usually be rescued by lifting the brightness. Drag the slider until the detail appears and download the result.
Frequently Asked Questions
How do I use the lighten image tool?
Drop your image onto the box above, adjust the controls, and the preview updates as you drag. When it looks right, choose PNG, JPG or WEBP and press Download. Nothing is uploaded at any point.
Are my files uploaded to a server?
No. The file is decoded and re-encoded directly in your browser using JavaScript and WebAssembly, and never leaves your device. That is what makes it safe for private photos, client work and anything confidential, and it is why the tool keeps working with your network disconnected once the page has loaded.
Why does my photo look washed out when I lighten it a lot?
Brightening multiplies every pixel value, so the brightest areas hit pure white and stop holding any detail — that is what looks washed out. Lift moderately, and if the shadows are still too dark the original probably lacks the data to recover, which no tool can invent.
Is there a limit or a watermark?
No limits, no watermark, no signup and no cost. Because the work happens on your own device there is no server bill to cover, so there is nothing to meter — the only real constraint is your device’s memory on very large files.
Does this work on Windows, Mac, iPhone and Android?
Yes. It runs in any modern browser on Windows, Mac, Linux, iPhone and Android with nothing to install and no account needed. Chrome, Edge, Firefox and Safari are all supported.