HTML Entity for Left Right Arrow Double Vertical Stroke (⇼)
Beginner
5 min read
Updated: Sep 2026
1 example
Unicode U+21FC
Definition
What Is the Left Right Arrow Double Vertical Stroke Entity?
Left Right Arrow Double Vertical Stroke (⇼) is the Arrows-block character at Unicode U+21FC (LEFT RIGHT ARROW WITH DOUBLE VERTICAL STROKE). A bidirectional arrow is crossed by a double vertical stroke.
Remember
Character ⇼
Unicode U+21FC
Hex entity ⇼
Decimal ⇼
Named entity (none in HTML5)
CSS escape \21FC
Not the same ↔ (↔) · ↮ (↮)
All of these produce the same glyph: ⇼. Prefer ⇼ (or ⇼) when you need an entity — there is no named form.
Using Hex Code: ⇼
Using HTML Code: ⇼
Using CSS Entity: ⇼
A ⇼ B
How It Works
1. Hex:U+21FC → ⇼ in HTML. The browser turns it into ⇼.
2. Decimal: same code point as 8700 → ⇼. Same result as hex.
3. CSS: use \21FC in content (not an HTML entity). #point::after appends that ⇼ after the paragraph text.
4. No named entity: HTML5 does not define &…; for this character — stick to numeric forms.
Pitfalls & Tips
Common mistakes when working with Left Right Arrow Double Vertical Stroke.
Look-alikes
⇼ ≠ ↔ ≠ ↮
Double vertical stroke, plain ↔, and single-stroke ↮ are different Unicode points.
Named
No named entity
Guessing names will not produce U+21FC. Use ⇼ or ⇼.
Fonts
Glyph may be missing
Arrows-block coverage varies for rarer forms. Test on your target devices or provide a fallback font.
CSS vs HTML
Do not mix escapes
\21FC belongs in CSS. ⇼ / ⇼ belong in HTML.
A11y
Add nearby words
Pair the glyph with equation text or use aria-label when it stands alone.
Semicolon
End references
Always finish with ; — write ⇼, not ⇼.
Compatibility
Browser Support
Left Right Arrow Double Vertical Stroke (U+21FC) and its entity forms (⇼, ⇼, CSS \\21FC) are supported in all modern browsers. Glyph coverage depends on the font.
✓ Universal encoding
Left Right Arrow Double Vertical Stroke (⇼)
Encode with hex, decimal, or CSS escape — or type ⇼ directly in UTF-8 HTML.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerIE 9+
Yes*
U+21FCFull support
Bottom line: Prefer ⇼ (or ⇼) in HTML. Use \\21FC only inside CSS content. There is no named entity.
Remember
Key Takeaways
Unicode: this symbol is U+21FC (decimal 8700).
HTML: use ⇼ or ⇼ — no named entity.
CSS: use \21FC inside content for generated text.
Watch out: ⇼ ≠ ↔ ≠ ↮.
One line:U+21FC → ⇼ / ⇼ / CSS \21FC.
Frequently Asked Questions
Use ⇼ (hex), ⇼ (decimal), or the CSS escape \21FC in the content property. All render ⇼ when the font supports the Arrows block. There is no named HTML entity.
U+21FC (LEFT RIGHT ARROW WITH DOUBLE VERTICAL STROKE). Hex 21FC, decimal 8700. It belongs to the Arrows block (U+2190–U+21FF).
No. HTML5 does not define a named entity for U+21FC. Use numeric references like ⇼ or ⇼.
Use it in math, logic, and diagrams when you need a left-right arrow crossed by a double vertical stroke. Prefer numeric entities when encoding must be explicit.
HTML entities (⇼ or ⇼) go in markup. The CSS escape \21FC is used in stylesheets (usually in the content property of ::before/::after). Both render ⇼.
↔ (U+2194) is a plain left-right arrow. ↮ (U+21AE) is a left-right arrow with a single stroke. U+21FC has a double vertical stroke through the arrow.
🤔
Did you know?
Left Right Arrow Double Vertical Stroke is Unicode U+21FC (decimal 8700) — LEFT RIGHT ARROW WITH DOUBLE VERTICAL STROKE. HTML5 has no named entity — use ⇼ or ⇼. Do not confuse it with a plain ↔ (U+2194) or the single-stroke form ↮ (U+21AE).
