@charsetBaseline · Widely available
The @charset CSS at-rule specifies the character encoding of an external style sheet.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1–1Not supported
2+Supportedsince May 21, 2009
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–1Not supported
1.5+Supportedsince Nov 29, 2005
Current: 157Safari
1–3.1Not supported
4+Supportedsince Jun 8, 2009
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1–3.2Not supported
4+Supportedsince Jun 21, 2010
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: @charset.
Feature detection
There’s no simple runtime check for this feature; rely on the support table and test in your target browsers.