HTML Devices Encoder / Decoder: What do stand for?

< stands for the less-than sign: stands for the greater-than sign: >
≤ stands for less-than or equal sign: ≤
≥ stands for the greater-than or equal sign: ≥

You can replace < with < Similarly with the others.https://www.web2generators.com/html-based-tools/online-html-entities-encoder-and-decoder https://www.w3schools.com/php/func_string_htmlspecialchars.asp& (ampersand) becomes & "(double quote) becomes " ' (single quote) becomes ' < (less than) becomes (greater than) becomes >