Left Right Double Arrow (⇔)

LEFT RIGHT DOUBLE ARROW · U+21D4

Windows Not available via Alt code

Mac Not available as a Mac Option shortcut

Chromebook Ctrl + Shift + U, then 21D4 and Enter

This reference card renders in your browser and needs JavaScript. Short version: Windows no Alt code, Mac no Mac shortcut, HTML ⇔.

How to type Left Right Double Arrow

Windows: no Alt code exists for this character; use the copy button above or the HTML entity below.
Mac: no dedicated Option-key shortcut; open the Character Viewer with Ctrl+Cmd+Space and search by name.
HTML: ⇔ or ⇔.
Chromebook: Ctrl+Shift+U, type 21D4, then Enter.

Reference

Unicode name: LEFT RIGHT DOUBLE ARROW
Code point: U+21D4
Category: Arrows
Also searched as: iff if and only if equivalent

Symbol data last reviewed: July 9, 2026.