The font-weight property sets the weight (thickness) of font glyphs. Numbers 1-1000 or keywords (normal=400, bold=700). Variable fonts support intermediate values.strong {
font-weight: bold;
}.heavy {
font-weight: 850;
}min:0max:9999step:100units:normalThe default value. Equivalent to 400.boldBold. Equivalent to 700.bolderOne step heavier than parent.lighterOne step lighter than parent.100Thin — the lightest weight.200Extra Light — very light.300Light — lighter than normal.400Normal — the default weight, equivalent to normal.500Medium — slightly heavier than normal.600Semi Bold — between normal and bold.700Bold — the standard bold weight, equivalent to bold.800Extra Bold — heavier than bold.900Black — the heaviest standard weight.CSS Fonts Module Level 4Editor's DraftW3CMDNCSS css aBcDeFShow all codeEdit CSS onlineThe plugin that remembers hundreds of CSS items for youEvery CSS property — in a live demonstrationThe bilingual CSS referencedefinitionexamplessyntaxmodulespecificationsourcesvisual demonstrationpreviousnext