Left guillemet.
More from Punctuation.
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+00AB (decimal 171).
Use « in HTML to render « on a web page.
On Windows you can type it with Alt+171 (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.