PNG ICO ICNS SVG MORE
Business & finance
Glyph
Font Awesome
exclamation, Circle
Black
512x512
exclamation
PNG ICO SVG MORE
Signs & symbols
Emergency signs
mark, emergency, sos
Gold
Mixed
Free Misc Icon Set 2
Alert, problem, exclamation
PNG SVG MORE
Files & folders
AwesomeFolders
Folder, Check, exclamation
UI
Freecns Cumulus
mark, exclamation, Error
PNG ICO ICNS MORE
48x48 Free Time Icons
Abort, exclamation, Up
Tomato
48x48
PNG MORE
24x24 Free Application Icons
stop, Abort, Block
24x24
Attack, Error, Alert
DarkSlateGray
Error, sign, Blocked
Red
Free Mobile Icon Kit
64x64
Desktop apps
16x16 Free Toolbar Icons
nell, Alert, time
LightCyan
16x16
problem, warn, danger