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

No. CSS Line Height runs in this browser tab. Files stay on the device. Limit note: line-height 1 to 2, unitless. CSS only. Copy in this tab.

Should I use CSS Letter Spacing instead of CSS Line Height?

Use CSS Line Height when you need Build a unitless line-height rule. Use CSS Letter Spacing when you need Build a letter-spacing em rule. They share a category (Design) but not the same job.

CSS Line Height

Build a unitless line-height rule.

Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab.

What CSS Line Height does

Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab.

Practical limit for CSS Line Height: line-height 1 to 2, unitless. CSS only. Copy in this tab. That is why output can differ from heavy desktop Design software. Read the tool-specific note again: Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab.

How to use CSS Line Height

Use CSS Line Height for this design job (css line height). CSS Letter Spacing is adjacent (Build a letter-spacing em rule.) but not the same.
Add the file type CSS Line Height accepts. Hint from the path: css line height. Build a unitless line-height rule.
Set only the options that match CSS Line Height. Neighbor CSS Opacity does something else (Build an opacity: 0–1 rule.). Tool note: Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab.
Run CSS Line Height in this tab. Browser memory still applies: line-height 1 to 2, unitless. CSS only. Copy in this tab.
Download or copy the result from CSS Line Height. If it is the wrong job, open CSS Letter Spacing instead.

When not to use CSS Line Height

Skip CSS Line Height when a neighbor tool matches better — start with CSS Letter Spacing or CSS Opacity — or when the description already warns the job will fail. In the tool’s own words: Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab.

Questions about CSS Line Height

What does CSS Line Height do that other Design pages on this site do not?: Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab. Short version: Build a unitless line-height rule.
Does CSS Line Height upload my file or text to Tool-You servers?: No. CSS Line Height runs in this browser tab. Files stay on the device. Limit note: line-height 1 to 2, unitless. CSS only. Copy in this tab.
Should I use CSS Letter Spacing instead of CSS Line Height?: Use CSS Line Height when you need Build a unitless line-height rule. Use CSS Letter Spacing when you need Build a letter-spacing em rule. They share a category (Design) but not the same job.
What are the limits of CSS Line Height?: line-height 1 to 2, unitless. CSS only. Copy in this tab. Also: Outputs line-height: N from 1 to 2. Unlike CSS Letter Spacing this is leading, not tracking. Unlike CSS Opacity this is not alpha. Copy the rule in this tab.