Does Vignette Image upload my file or text to Tool-You servers?

No. Vignette Image runs in this browser tab. Files stay on the device. Limit note: Strength 0.15–0.9. PNG. First GIF frame only. Max 20 MB.

Should I use Adjust Image Brightness instead of Vignette Image?

Use Vignette Image when you need Darken the corners with a radial falloff. Use Adjust Image Brightness when you need Brighten or darken a photo locally. They share a category (Images) but not the same job.

Vignette Image

Darken the corners with a radial falloff.

Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only.

What Vignette Image does

Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only.

Practical limit for Vignette Image: Strength 0.15–0.9. PNG. First GIF frame only. Max 20 MB. That is why output can differ from heavy desktop Images software. Read the tool-specific note again: Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only.

How to use Vignette Image

Stay on this Vignette Image page (/vignette-image). Do not switch to Adjust Image Brightness unless you actually want Brighten or darken a photo locally..
Add the file type Vignette Image accepts. Hint from the path: vignette image. Darken the corners with a radial falloff.
Set only the options that match Vignette Image. Neighbor Image Opacity does something else (Make a PNG more transparent.). Tool note: Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only.
Run Vignette Image in this tab. Browser memory still applies: Strength 0.15–0.9. PNG. First GIF frame only. Max 20 MB.
Download or copy the result from Vignette Image. If it is the wrong job, open Adjust Image Brightness instead.

When not to use Vignette Image

Skip Vignette Image when a neighbor tool matches better — start with Adjust Image Brightness or Image Opacity — or when the description already warns the job will fail. In the tool’s own words: Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only.

Questions about Vignette Image

What does Vignette Image do that other Images pages on this site do not?: Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only. Short version: Darken the corners with a radial falloff.
Does Vignette Image upload my file or text to Tool-You servers?: No. Vignette Image runs in this browser tab. Files stay on the device. Limit note: Strength 0.15–0.9. PNG. First GIF frame only. Max 20 MB.
Should I use Adjust Image Brightness instead of Vignette Image?: Use Vignette Image when you need Darken the corners with a radial falloff. Use Adjust Image Brightness when you need Brighten or darken a photo locally. They share a category (Images) but not the same job.
What are the limits of Vignette Image?: Strength 0.15–0.9. PNG. First GIF frame only. Max 20 MB. Also: Multiplies RGB by a center-to-edge curve, 0.15–0.9. Unlike Brightness this is spatial, not a flat percent. Unlike Opacity this does not change alpha. PNG out. First GIF frame only.