Copy & encode
Character
⇄Unicode codepoint
U+21C4HTML decimal entity
⇄HTML hex entity
⇄CSS escape
\21C4JavaScript escape
\u21C4Meaning and usage
In user interfaces, this icon represents data synchronization, currency exchange, or swapping elements. In chemistry, it is used to indicate a reversible reaction that can proceed in both directions.
Frequently Asked Questions
When should I use this double arrow instead of a single bidirectional arrow?
Use this symbol when you want to emphasize two separate, simultaneous processes in opposite directions, whereas a single double-headed arrow usually represents a simple connection or state.
How is this symbol represented in CSS?
In CSS content properties, you can display this symbol by using the escaped hexadecimal value backslash two one C four.