Does CSS Opacity upload my file or text to Tool-You servers?

No. CSS Opacity runs in this browser tab. Files stay on the device. Limit note: Opacity 0–1, two decimals. CSS rule only. Copy in this tab.

Should I use CSS Outline instead of CSS Opacity?

Use CSS Opacity when you need Build an opacity: 0–1 rule. Use CSS Outline when you need Build an outline width, style, and color. They share a category (Design) but not the same job.

CSS Opacity

Build an opacity: 0–1 rule.

Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab.

What CSS Opacity does

Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab.

This URL is only for CSS Opacity (css opacity). Build an opacity: 0–1 rule. Other Design tools on Tool-You look similar in the chrome, so the job definition below is the part that belongs to CSS Opacity alone: Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab.

How to use CSS Opacity

Use CSS Opacity for this design job (css opacity). CSS Outline is adjacent (Build an outline width, style, and color.) but not the same.
Add the file type CSS Opacity accepts. Hint from the path: css opacity. Build an opacity: 0–1 rule.
Set only the options that match CSS Opacity. Neighbor CSS Box Shadow does something else (Tune a box-shadow live.). Tool note: Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab.
Run CSS Opacity in this tab. Browser memory still applies: Opacity 0–1, two decimals. CSS rule only. Copy in this tab.
Download or copy the result from CSS Opacity. If it is the wrong job, open CSS Outline instead.

When not to use CSS Opacity

Skip CSS Opacity when a neighbor tool matches better — start with CSS Outline or CSS Box Shadow — or when the description already warns the job will fail. In the tool’s own words: Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab.

Questions about CSS Opacity

What does CSS Opacity do that other Design pages on this site do not?: Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab. Short version: Build an opacity: 0–1 rule.
Does CSS Opacity upload my file or text to Tool-You servers?: No. CSS Opacity runs in this browser tab. Files stay on the device. Limit note: Opacity 0–1, two decimals. CSS rule only. Copy in this tab.
Should I use CSS Outline instead of CSS Opacity?: Use CSS Opacity when you need Build an opacity: 0–1 rule. Use CSS Outline when you need Build an outline width, style, and color. They share a category (Design) but not the same job.
What are the limits of CSS Opacity?: Opacity 0–1, two decimals. CSS rule only. Copy in this tab. Also: Outputs opacity: N with two decimal places. Unlike Image Opacity this is CSS, not a PNG. Unlike CSS Outline this is not a stroke. Copy the rule in this tab.