Lightning Bolt Symbols

A bolt from four different places

There is no single lightning bolt in Unicode, and the bolts you see in names and bios come from four unrelated places. ⚡ (HIGH VOLTAGE SIGN) is the most widely used and is an emoji that came from a safety sign for dangerous voltage. ϟ is a Greek letter, koppa, whose glyph in many fonts has a zigzag shape. ↯ (DOWNWARDS ZIGZAG ARROW) is a technical arrow, and ☇ (LIGHTNING) is an old symbol from the Miscellaneous Symbols block, grouped with ☈ (THUNDERSTORM). Each has a different style, colour behaviour and set of side effects.

The names tell you how they were meant to be used. ⚡ signals danger or energy, ϟ is part of a writing system, ↯ is a diagram or logic mark and ☇ is a weather-related sign. None of them was designed as a “cool username decoration”, but all have been repurposed.

⚡ the emoji

⚡ is the one with the strongest recognition. It is always a colour emoji on phones, usually yellow, and it follows no text colour. It is accepted in most social profiles. It is not accepted in every game, because some filters only allow text characters. It is the right choice for energy, speed and electricity topics, and also for a sudden or exciting tone.

⚡ comes with a nuance: the phrase “high voltage” is the official name, so a screen reader will announce it that way. Some readers say “high voltage sign” and others say “lightning”.

ϟ and the flat bolt

ϟ is GREEK SMALL LETTER KOPPA, an archaic letter that stood for a number in the Greek numeral system. Its glyph, in many fonts, resembles a bolt, and that resemblance made it a fixture of gaming names. Its advantage is that it takes the text colour and does not turn into an emoji. Its drawbacks:

• A screen reader reads it as “Greek small letter koppa”.
• It requires a font that includes Greek, which almost every system has.
• Two ϟ side by side can look like the runic SS insignia of Nazi Germany. That is a reason to use one bolt only, and not two next to each other, or to choose ⚡ instead. Many platforms moderate this, and an accidental resemblance in a username can still lead to a flag.

↯ gives a similar flat look with a different design, an angular zigzag with an arrowhead. In logic, it signals contradiction, but few people read it that way in a name. ☇ is a thin, diagonal bolt, and ⌁ (ELECTRIC ARROW) draws a zigzag arrow used in electrical diagrams.

Storm and power marks

The second group is made of weather marks. ☈ (THUNDERSTORM) is the text form, and 🌩 (CLOUD WITH LIGHTNING) and ⛈ (THUNDER CLOUD AND RAIN) are colour emoji. They suit weather updates and dramatic captions. The third group, with 🔋 (BATTERY), 🔌 (ELECTRIC PLUG) and 💥 (COLLISION SYMBOL), covers power and impact for tech and fitness content. 🪫 (LOW BATTERY) is a recent emoji, so older devices may show a box.

Which bolt to pick

Typing a bolt

1. Word. Type 26A1 and press Alt then X for ⚡. Use 3DF for ϟ, 21AF for ↯, and 2607 for ☇.
2. Windows emoji panel. Press the Windows key and period, then search lightning or high voltage.
3. Mac. Open the Character Viewer from Control, Command and Space and search lightning.
4. iPhone and Android. Search the emoji keyboard for high voltage. To type ϟ, add a Greek keyboard and look for koppa, or copy it from this page.
5. Text replacement. On iOS and macOS, a shortcut like “bolt” can expand to ⚡.

There are no standard Windows Alt codes for any of these characters.

Accessibility

A string of bolts is read one by one, and ϟ is announced as a Greek letter, which can confuse someone listening. If the bolt is only decoration, put it after the name, and use one. For emoji, screen readers speak the standard name (“high voltage”), which is clear. The fancy text accessibility guide goes through how names are spoken.

Compatibility notes

⚡ is covered by emoji fonts on essentially every modern device. ϟ and ↯ are in most system fonts but may be missing from minimal ones, giving a box. If a bolt turns into a box on your device, this explanation of missing glyphs applies. For other pointed decoration, see star symbols, sparkle symbols and arrow symbols.