The font-weight attribute refers to the boldness or lightness of the glyphs used to render the text, relative to other fonts in the same font family.

Note: As a presentation attribute, font-weight can be used as a CSS property. See the css font-weight property for more information.

As a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altGlyph>, <text>, <textPath>, <tref>, and <tspan>

<svg viewBox="0 0 200 30" xmlns="http://www.w3.org/2000/svg">
  <text y="20" font-weight="normal">Normal text</text>
  <text x="100" y="20" font-weight="bold">Bold text</text>

Usage notes

Value normal | bold | bolder | lighter | <number>
Default value normal
Animatable Yes

For a description of the values, please refer to the CSS font-weight property.


Specification Status Comment
CSS Fonts Module Level 4
The definition of 'font-weight' in that specification.
Working Draft Defines font-weight to accept any numbers between 1 and 1000.
CSS Fonts Module Level 3
The definition of 'font-weight' in that specification.
Candidate Recommendation No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'font-weight' in that specification.
Recommendation Initial definition

Browser compatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
font-weight ? ? ? ? ? ?
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
font-weight ? ? ? ? ? ?

See also

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