Escape the five characters that have meaning in HTML — ampersand, less-than, greater-than, quote and apostrophe — so your text is shown on a page instead of being read as markup.
<a href="x">Tom & Jerry</a>
<a href="x">Tom & Jerry</a>
Whenever you want to display code or user text on a web page without the browser treating it as markup.
No. This tool runs entirely in your browser — nothing you type or paste is uploaded, logged or stored anywhere.
There is no fixed limit. Very large documents depend on your device’s memory, but ordinary pages and files are handled instantly.