Up arrow symbol ↑

Windows

Hold Alt and type 24 on the numeric keypad, then let go of Alt.

In Microsoft Word you can also type 2191 and then press Alt+X.

Mac

Press Control+Command+Space, search for “up arrow” and double-click ↑.

That shortcut opens the Character Viewer, which has every Unicode symbol.

iPhone

Tap Copy above, then touch and hold where you want ↑ and tap Paste.

To type it from the keyboard, open Settings › General › Keyboard › Text Replacement, tap +, paste ↑ as the Phrase and add a Shortcut.

Android

Tap Copy above, then touch and hold where you want ↑ and tap Paste.

To type it from the keyboard in Gboard, open Gboard settings › Dictionary › Personal dictionary, tap +, paste ↑ and add a shortcut.

Linux

Press Ctrl+Shift+U, type 2191, then press Space or Enter. This works in most GTK and IBus apps.

Word and Google Docs

Word: type 2191, then press Alt+X.

Google Docs: open Insert › Special characters and search for “up arrow”.