Warning Symbols
10 Warning SymbolsWarning, hazard, caution, and safety symbols ready to copy for technical notices, checklists, and signs.
Warning & Caution Signs 4
Standard cautionary exclamation signs and high voltage markers.
Biohazard & Radiation 4
Radioactive, biohazard, skull and crossbones, and toxic danger signs.
Prohibition & Restriction 2
Prohibited, no entry, and restriction boundary signs.
Practical Guidance & Usage
Practical Guidance & Usage
Warning symbols provide immediate visual alerts in documentation, README files, and safety instructions.
Compatibility & Rendering
Universally supported in standard monospace and sans-serif fonts.
Keyboard Shortcuts (Alt Codes)
Hold down the Alt key and type the decimal code on your numeric keypad to insert the symbol directly in Windows.
| Symbol | Name | Alt Code | HTML Entity |
|---|---|---|---|
| ☠ | Skull And Crossbones | Alt+9760 |
☠
|
| ☢ | Radioactive Sign | Alt+9762 |
☢
|
| ☣ | Biohazard Sign | Alt+9763 |
☣
|
| ☡ | Caution Sign | Alt+9761 |
☡
|
| ⛔ | No Entry | Alt+9940 |
⛔
|
| 🕱 | Black Skull And Crossbones | Alt+128369 |
🕱
|
| 🚫 | No Entry Sign | Alt+128683 |
🚫
|
| ‼ | Double Exclamation Mark |
‼
|
|
| ⁉ | Exclamation Question Mark |
⁉
|
|
| ⚠ | Warning Sign | Alt+9888 |
⚠
|