Invert Colors

Invert Colors is a privacy-first browser tool that inverts image colors locally. It is made by Ava and lives at invert-colors.com. Visitors flip image colors entirely in the browser. The tool is free, and visitors do not need an account.
Supported files are JPG, JPEG, PNG, WEBP, and HEIC. Those formats cover ordinary photos from cameras and phones, including HEIC images from Apple devices. You can invert one picture or a batch of up to 30 files. Each file can be up to 20MB. Processing stays on your device. Files never leave the browser and are not sent to a server. After the page loads, inversion runs locally, which is how the tool keeps images private.
Color inversion reverses each pixel so bright areas turn dark and dark areas turn bright. The result is a full negative of the picture. The page shows the original next to the inverted image so you can check it before you save. A single image is shown side by side. A batch shows thumbnail previews of every processed file. If a photo is turned the wrong way, rotation controls let you fix the orientation. Previews update in the browser as you work.
Before download you pick compression: no compression, or about 90, 70, 50, or 30 percent quality. You can save as JPG, JPEG, PNG, or WEBP, or keep the original format. One image downloads on its own. A batch can be saved file by file or as a ZIP of all inverted images. Saved names follow the originals, with the extension of the format you chose.
There is no charge, no visitor registration, and no watermark on the output. Open the page, click the upload area or drag files in, add more files if you need them, review the inverted colors, and download. Use it for a design negative, a private photo inversion, or a batch of up to 30 images that never leave your device. Ava can be reached at support@invert-colors.com. The website is https://invert-colors.com/.