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

No. High Contrast Image runs in this browser tab. Files stay on the device. Limit note: Images. Fixed 180% contrast. Output PNG. Max 20 MB.

Should I use Image Contrast instead of High Contrast Image?

Use High Contrast Image when you need Fixed 180% contrast, then PNG. Use Image Contrast when you need Raise or lower contrast. They share a category (Images) but not the same job.

High Contrast Image

Fixed 180% contrast, then PNG.

Applies CSS contrast(180%). Unlike Contrast Image this is a fixed hard boost, not a slider. Unlike Threshold Image this keeps gray ramps, not a binary cut. Runs in the browser on a canvas.

What High Contrast Image does

Applies CSS contrast(180%). Unlike Contrast Image this is a fixed hard boost, not a slider. Unlike Threshold Image this keeps gray ramps, not a binary cut. Runs in the browser on a canvas.

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

How to use High Contrast Image

Stay on this High Contrast Image page (/high-contrast-image). Do not switch to Image Contrast unless you actually want Raise or lower contrast..
Add the file type High Contrast Image accepts. Hint from the path: high contrast image. Fixed 180% contrast, then PNG.
Set only the options that match High Contrast Image. Neighbor Desaturate Image does something else (Cut saturation to 25%, then PNG.). Tool note: Applies CSS contrast(180%). Unlike Contrast Image this is a fixed hard boost, not a slider. Unlike Threshold Image this keeps gray ramps, not a binary cut. Runs in the browser on a canvas.
Run High Contrast Image in this tab. Browser memory still applies: Images. Fixed 180% contrast. Output PNG. Max 20 MB.
Download or copy the result from High Contrast Image. If it is the wrong job, open Image Contrast instead.

When not to use High Contrast Image

Skip High Contrast Image when a neighbor tool matches better — start with Image Contrast or Desaturate Image — or when the description already warns the job will fail. In the tool’s own words: Applies CSS contrast(180%). Unlike Contrast Image this is a fixed hard boost, not a slider. Unlike Threshold Image this keeps gray ramps, not a binary cut. Runs in the browser on a canvas.

Questions about High Contrast Image

What does High Contrast Image do that other Images pages on this site do not?: Applies CSS contrast(180%). Unlike Contrast Image this is a fixed hard boost, not a slider. Unlike Threshold Image this keeps gray ramps, not a binary cut. Runs in the browser on a canvas. Short version: Fixed 180% contrast, then PNG.
Does High Contrast Image upload my file or text to Tool-You servers?: No. High Contrast Image runs in this browser tab. Files stay on the device. Limit note: Images. Fixed 180% contrast. Output PNG. Max 20 MB.
Should I use Image Contrast instead of High Contrast Image?: Use High Contrast Image when you need Fixed 180% contrast, then PNG. Use Image Contrast when you need Raise or lower contrast. They share a category (Images) but not the same job.
What are the limits of High Contrast Image?: Images. Fixed 180% contrast. Output PNG. Max 20 MB. Also: Applies CSS contrast(180%). Unlike Contrast Image this is a fixed hard boost, not a slider. Unlike Threshold Image this keeps gray ramps, not a binary cut. Runs in the browser on a canvas.