Does this inliner upload my HTML/CSS?

No. Inlining runs locally in your browser and nothing is transmitted.

Do media queries work?

No. This simple inliner applies common selectors and ignores media queries and advanced cascade rules.

Which styles win if duplicated?

Existing inline styles keep priority. Among CSS rules, later rules overwrite earlier ones.

Free CSS Inliner for Email

Inline CSS

This approximation covers common selectors. For complex cascades, verify output in email clients.

About this CSS inliner

Email clients often ignore <style> blocks, so inlining CSS is a best practice. This tool applies selector rules to matching elements and writes them into the style attribute.

Supported behavior

Multiple selectors per rule (comma‑separated)
Rule order treated as priority (last wins)
Merges with existing inline styles (inline wins for duplicates)

Limitations

Pseudo‑classes/elements (e.g., :hover) are ignored when matching
No media queries or advanced cascade specificity

Related tools

Privacy: runs entirely in your browser—no data is sent anywhere.