CSS2.1 User Agent Style Sheet Defaults

Notes: Values for IE8b are based on information from a post-Beta1 build so some values might be different as the feature has since been updated.

CSS2.1 User Agent Style Sheet Defaults
ElementPropertyAppendix DIE7IE8FF2FF3OperaSafari 3.1Final Styles
Addressdisplayblockblockblockblockblockblockblockblock
font-styleitalicitalicitalicitalicitalicitalicitalicitalic
Bfont-weightbolder700bolder401401700boldbolder
Bigfont-size1.17em13.55pt1.17emlarger - 18px18px18px19px1.17em
Blockquotedisplayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 30pt1em 40px1em 40px1em 40px1em 10px 1em 40px1em 40px1em 40px
margin-left40px30pt40px40px40px40px40px40px
margin-right40px30pt40px40px40px10px40px40px
Bodydisplayblockblockblockblockblockblockblockblock
margin8px15px 10px8px8px8px8px8px8px
BRbr:beforecontent: "\A"undefinedcontent: "\A"nullcontent: "\A"content: "\A"nullcontent: "\A"
Buttondisplayinline-blockinlineinline-blockinlineinlineinline-blockinline-blockinline-block
Captiondisplaytable-captionblocktable-captiontable-captiontable-captiontable-captiontable-captiontable-caption
text-aligncentercentercentercentercentercenterwebkit-centercenter
Centerdisplayblockblockblockblockblockblockblockblock
text-aligncentercentercentercentermoz-centercenterwebkit-centercenter
Citefont-styleitalicitalicitalicitalicitalicitalicitalicitalic
ElementPropertyAppendix DIE7IE8FF2FF3OperaSafari 3.1Final Styles
Codefont-familymonospaceCourier NewmonospacemonospacemonospaceCourier newwebkit-monospacemonospace
Coldisplaytable-columnblocktable-columntable-columntable-columntable-columntable-columntable-column
Colgroupdisplaytable-column-groupblocktable-column-grouptable-column-grouptable-column-grouptable-column-grouptable-column-grouptable-column-group
DDdisplayblockblockblockblockblockblockblockblock
margin-left40px30pt40px40px40px40px40px40px
Deltext-decorationline-throughline-throughline-throughline-throughline-throughline-throughline-throughline-through
DIRdisplayblockblockblockblockblockblockblockblock
margin1.12em 0auto auto auto 30pt1em 016px 016px 016px 016px 01em 0
margin-left40px30pt0px0px0px40px0px40px
Divdisplayblockblockblockblockblockblockblockblock
DLdisplayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 01em 01em 01em 01em 01em 01em 0
page-break-insideavoidavoidavoidnonenoneavoidavoidavoid
DTdisplayblockblockblockblockblockblockblockblock
Emfont-styleitalicitalicitalicitalicitalicitalicitalicitalic
Fieldsetdisplayblockblockblockblockblockblockblockblock
margin1.12em 000 2px0 2px0 2px0 2px0 2px0 2px
Formdisplayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 00000 0 1em0 0 1em0
Framedisplayblockblockblockblockblockblockblockblock
Framesetdisplayblockblockblockblockblockblockblockblock
ElementPropertyAppendix DIE7IE8FF2FF3OperaSafari 3.1Final Styles
H1displayblockblockblockblockblockblockblockblock
font-size2em24pt2em32px32px32px32px2em
margin0.67em 014.25pt 00.67em 021.4667px 021.4333px 021px 021px 00.67em 0
font-weightbolder700bolderboldbold700boldbolder
page-break-afteravoidavoidavoidnullnullavoidavoidavoid
page-break-beforealwaysalwaysalwaysnullnullalwaysalwaysalways
H2displayblockblockblockblockblockblockblockblock
font-size1.5em18pt1.5em24px24px24px24px1.5em
margin0.75em 014.25pt 00.83em 019.9333px 019.9167px 020px 0px19px 00.83em 0
font-weightbolder700bolderboldbold700boldbolder
page-break-afteravoidavoidavoidnullnullavoidavoidavoid
H3displayblockblockblockblockblockblockblockblock
font-size1.17em13.55pt1.17em18.7333px18.7167px18px19px1.17em
margin0.83em 014.25pt 01em 018.7333px 018.7167px 018px 018px 01em 0
font-weightbolder700bolderboldbold700boldbolder
page-break-afteravoidavoidavoidnullnullavoidavoidavoid
H4displayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 01.325em 021.2667px 021.2833px 016px 021px 01.325em 0
font-weightbolder700bolderboldbold700boldbolder
page-break-afteravoidavoidavoidnullnullavoidavoidavoid
H5displayblockblockblockblockblockblockblockblock
font-size0.83em10pt0.83em13.2667px13.2833px13px13px0.83em
margin1.5em 014.25pt 01.67em 022.1333px 022.1833px 021px 022px 01.67em 0
font-weightbolder700bolderboldbold700boldbolder
page-break-afteravoidavoidavoidnullnullavoidavoidavoid
H6displayblockblockblockblockblockblockblockblock
font-size0.75em7.55pt0.67em10.7333px10.7167px10px11px0.67em
margin1.67em 014.25pt 02.33em 025px 024.9667px 023px 024px 02.33em 0
font-weightbolder700bolderboldbold700boldbolder
page-break-afteravoidavoidavoidnullnullavoidavoidavoid
ElementPropertyAppendix DIE7IE8FF2FF3OperaSafari 3.1Final Styles
Headdisplaynoneinlinenonenonenonenonenonenone
HRdisplayblockinlineblockblockblockblockblockblock
border1px insetmedium none1px inset1px -moz-bg-inset1px inset1px inset1px inset1px inset
margin0 auto0 auto
HTMLdisplayblockinlineblockblockblockblockblockblock
Ifont-styleitalicitalicitalicitalicitalicitalicitalicitalic
Inputdisplayinline-blockinlineinline-blockinlineinlineinlineinline-blockinline-block
Instext-decorationunderlineunderlineunderlineunderlineunderlineunderlineunderlineunderline
KBDfont-familymonospaceCourier NewmonospacemonospacemonospaceCourier newwebkit-monospacemonospace
LIdisplaylist-itemblocklist-itemlist-itemlist-itemlist-itemlist-itemlist-item
Menudisplayblockblockblockblockblockblockblockblock
margin1.12em 00 0 0 30pt1em 016px 016px 016px 016px 01em 0
margin-left40px30pt0px0px0px40px0px40px
Noframesdisplayblockblockblockblockblockblockblockblock
OLdisplayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 0 14.25pt 30pt1em 01em 01em 01em 01em 01em 0
margin-left40px30pt0px00000
padding-start40pxmoz-padding-start: 40px40pxwebkit-padding-start: 40px
list-style-typedecimalundefineddecimaldecimaldecimaldecimaldecimaldecimal
page-break-insideavoidavoidavoidnullnullavoidavoidavoid
ElementPropertyAppendix DIE7IE8FF2FF3OperaSafari 3.1Final Styles
Pdisplayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 01em 01em 01em 01em 01em 01em 0
Predisplayblockblockblockblockblockblockblockblock
font-familymonospaceCourier NewmonospacemonospacemonospaceCourier newwebkit-monospacemonospace
margin14.25pt 01em 01em 01em 0
white-spaceprepreprepreprepreprepre
Stext-decorationline-throughline-throughline-throughline-throughline-throughline-throughline-throughline-through
Sampfont-familymonospaceCourier NewmonospacemonospacemonospaceCourier newwebkit-monospacemonospace
Selectdisplayinline-blockinlineinline-blockinlineinlineinlineinline-blockinline-block
Smallfont-size0.83em10pt0.83em13px13px13px13px0.83em
Striketext-decorationline-throughline-throughline-throughline-throughline-throughline-throughline-throughline-through
Strongfont-weightbolder700bolder401401700boldbolder
Subfont-size0.83em10pt0.83em13px13px13px13px0.83em
vertical-alignsubautosubsubsubsubsubsub
Supfont-size0.83em10pt0.83em13px13px13px13px0.83em
vertical-alignsupautosupsupsupsupsupsup
Tabledisplaytableblocktabletabletabletabletabletable
border-spacing2pxnull2px2px2px2px2px2px
Tbodydisplaytable-row-groupblocktable-row-grouptable-row-grouptable-row-grouptable-row-grouptable-row-grouptable-row-group
vertical-alignmiddleautomiddlemiddlemiddlebaselinemiddlemiddle
TDdisplaytable-cellblocktable-celltable-celltable-celltable-celltable-celltable-cell
vertical-aligninheritautoinheritinheritinheritinheritinheritinherit
ElementPropertyAppendix DIE7IE8FF2FF3OperaSafari 3.1Final Styles
Textareadisplayinline-blockinlineinline-blockinlineinlineinlineinline-blockinline-block
Tfootdisplaytable-footer-groupblocktable-footer-grouptable-footer-grouptable-footer-grouptable-footer-grouptable-footer-grouptable-footer-group
vertical-alignmiddleautomiddlemiddlemiddlebaselinemiddlemiddle
THdisplaytable-cellblocktable-celltable-celltable-celltable-celltable-celltable-cell
font-weightbolder700bolderboldbold700boldbolder
text-aligncentercentercentercentercentercentercentercenter
vertical-aligninheritautoinheritinheritinheritinheritinheritinherit
Theaddisplaytable-header-groupblocktable-header-grouptable-header-grouptable-header-grouptable-header-grouptable-header-grouptable-header-group
vertical-alignmiddleautomiddlemiddlemiddlebaselinemiddlemiddle
TRdisplaytable-rowblocktable-rowtable-rowtable-rowtable-rowtable-rowtable-row
TTfont-familymonospaceCourier NewmonospacemonospacemonospaceCourier newwebkit-monospacemonospace
Utext-decorationunderlineunderlineunderlineunderlineunderlineunderlineunderlineunderline
ULdisplayblockblockblockblockblockblockblockblock
margin1.12em 014.25pt 0 14.25pt 30pt1em 01em 01em 01em 01em 01em 0
margin-left40px30pt0px
padding-start40pxmoz-padding-start: 40px40pxwebkit-padding-start: 40px
page-break-insideavoidavoidavoidnullnullavoidavoidavoid
Varfont-styleitalicitalicitalicitalicitalicitalicitalicitalic

Other sites showing CSS defaults.

  1. Internet Explorer User Agent Style Sheets from IE6 to IE9.