Windows
Hold Alt and type 251 on the numeric keypad.
Checks
Copy the character, or use the shortcut that matches your keyboard and app.
Hold Alt and type 251 on the numeric keypad.
Option + V (in some apps)
Insert → Symbol → ✓
Insert → Special characters → check
Click the keycap, then paste with Ctrl+V or Cmd+V.
Num Lock on, hold Alt, type 251, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+2713✓✓\2713\u{2713}Alt + 251