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

No. Darken Image runs in this browser tab. Files stay on the device. Limit note: Images. Fixed 70% brightness. Output PNG. Max 20 MB.

Should I use Adjust Image Brightness instead of Darken Image?

Use Darken Image when you need Fixed 70% brightness, then PNG. Use Adjust Image Brightness when you need Brighten or darken a photo locally. They share a category (Images) but not the same job.

Darken Image

Fixed 70% brightness, then PNG.

Applies CSS brightness(70%). Unlike Brightness Image this is a fixed darken, not a slider. Unlike Vignette Image this darkens the whole frame, not only corners. Runs in the browser on a canvas.

What Darken Image does

Applies CSS brightness(70%). Unlike Brightness Image this is a fixed darken, not a slider. Unlike Vignette Image this darkens the whole frame, not only corners. Runs in the browser on a canvas.

The interactive controls for Darken Image load after this article so crawlers still read the instructions. Path /darken-image is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for Darken Image.

How to use Darken Image

Stay on this Darken Image page (/darken-image). Do not switch to Adjust Image Brightness unless you actually want Brighten or darken a photo locally..
Add the file type Darken Image accepts. Hint from the path: darken image. Fixed 70% brightness, then PNG.
Set only the options that match Darken Image. Neighbor High Contrast Image does something else (Fixed 180% contrast, then PNG.). Tool note: Applies CSS brightness(70%). Unlike Brightness Image this is a fixed darken, not a slider. Unlike Vignette Image this darkens the whole frame, not only corners. Runs in the browser on a canvas.
Run Darken Image in this tab. Browser memory still applies: Images. Fixed 70% brightness. Output PNG. Max 20 MB.
Download or copy the result from Darken Image. If it is the wrong job, open Adjust Image Brightness instead.

When not to use Darken Image

Skip Darken Image when a neighbor tool matches better — start with Adjust Image Brightness or High Contrast Image — or when the description already warns the job will fail. In the tool’s own words: Applies CSS brightness(70%). Unlike Brightness Image this is a fixed darken, not a slider. Unlike Vignette Image this darkens the whole frame, not only corners. Runs in the browser on a canvas.

Questions about Darken Image

What does Darken Image do that other Images pages on this site do not?: Applies CSS brightness(70%). Unlike Brightness Image this is a fixed darken, not a slider. Unlike Vignette Image this darkens the whole frame, not only corners. Runs in the browser on a canvas. Short version: Fixed 70% brightness, then PNG.
Does Darken Image upload my file or text to Tool-You servers?: No. Darken Image runs in this browser tab. Files stay on the device. Limit note: Images. Fixed 70% brightness. Output PNG. Max 20 MB.
Should I use Adjust Image Brightness instead of Darken Image?: Use Darken Image when you need Fixed 70% brightness, then PNG. 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 Darken Image?: Images. Fixed 70% brightness. Output PNG. Max 20 MB. Also: Applies CSS brightness(70%). Unlike Brightness Image this is a fixed darken, not a slider. Unlike Vignette Image this darkens the whole frame, not only corners. Runs in the browser on a canvas.