Copy and paste this symbol: ✓
On Windows, press and hold Alt, then type 0252 on the numeric keypad for a tick-like symbol: ü
On Mac, press Option + V for a check mark: ✓
In Microsoft Word, type 2713 and press Alt + X: ✓
In Google Docs, go to Insert > Special characters and search for check mark
On Linux, use the character map or Unicode input for check mark symbols
In HTML, use ✓ or ✓ for a check mark
In Unicode, use U+2713 for ✓ or U+2714 for ✔