Widely Available
Font synthesis
id: font-synthesis-weight
font-synthesis-weight
The
font-synthesis-weight CSS property sets whether or not the browser should synthesize bold typefaces when they're missing from the font.
Baseline Status:
Achieved Widely Available on Sep 27, 2025 (Cross-browser Newly Available since Mar 27, 2023).
Desktop Browser Engine Support
Google Chrome
97
Supported
Mozilla Firefox
111
Supported
Apple Safari
16.4
Supported
Microsoft Edge
97
Supported
Mobile Browser Engine Support
Chrome Android
97
Firefox Android
111
Safari iOS
16.4
Specifications and References