Unicode character database / string analyzier
You can find a full list of all the Unicode characters (as of v11.0) grouped by category here. Click a category to view its full contents or use the search above to find a specific symbol or analyze a string of characters. Try these:
The emoji categories at the end are provided for the sake of completeness and although they largely overlap with regular unicode characters, a lot of emoji are actually combinations of multiple characters stringed together. Some characters (eg. ☢) have an emoji variation (☢️).