Encode special characters to HTML entities and decode entities back to characters.
HTML Entity Encoder/Decoder is a free, browser-based utility built for developers and engineers who need a fast, reliable way to encode special characters to html entities and decode entities back to characters. Whether you're debugging an API response, preparing data for deployment, or validating configuration files, this tool handles the job in seconds — with zero server calls. Everything runs locally in your browser, so your source code and data stay private.