Directive: font src

Overview

The font-src directive specifies valid sources for fonts loaded using @font-face.

Affects: @font-face

Required reading:

• Can I use font-src?
• MDN Web Docs reference

Usage examples

Accepts one or more schemes or hosts, the 'self' keyword, or the 'none' keyword.

font-src 'none'

font-src 'self'

font-src example.com

font-src example.com example.org

font-src https://fonts.google.com

font-src https:

Fallbacks

✅ font-src will fallback to default-src if it is undefined.

• default-src
  • font-src

Possible errors

• CSP-0100 — [ERROR] directive %s has an invalid value %s

For developers

ABNF (CSP3)

directive-name  = "font-src"
directive-value = serialized-source-list

See ABNF: serialized-source-list

Type

• source-list in CSP2
• serialized-source-list in CSP3

References

• CSP Level 2 reference
• CSP Level 3 reference
• MDN Web Docs reference
• Can I use font-src?