The Downwards Double Arrow symbol (⇓). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Arrows.
The quickest way is to copy ⇓ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
⇓ is U+21D3 (decimal 8659).
Use ⇓ in HTML to render ⇓ on a web page.
On Windows you can type it with Alt+8659 (hold Alt and enter the number on the numeric keypad).
Yes — copying is completely free and unlimited, and works right in your browser with no sign-up.