HTML Encode/Decode

Convert special characters to HTML entities or decode HTML entities back to their original characters.

This tool generates fictitious data intended exclusively for software testing and development purposes. The data does not correspond to real people or entities and must not be used for illegal, fraudulent purposes, or in ways that violate the privacy of others. Compliant with LGPD (Brazilian Data Protection Law).

See also:

CPF & CNPJ Algorithm
Voter ID Validator
NIF Generator
Person Generator
CI Validator (Uruguay)
DNI (Argentina)
CNH Validator
Fictitious Data in Testing

About HTML Encode/Decode

What is HTML encoding?

HTML Encoding converts special characters to HTML entities. This prevents the browser from interpreting those characters as HTML tags, preventing rendering errors and XSS (Cross-Site Scripting) vulnerabilities.

Encoding vs. decoding

Encoding converts special characters to HTML entities, making the text safe to embed in HTML documents. Decoding reverses the process, converting entities back to their original characters. Our tool supports both directions instantly. It handles all standard HTML entities including named entities and numeric entities for the full Unicode range.

Security and developer use cases

HTML encoding is a fundamental security practice in web development. Any user-supplied content displayed on a web page must be encoded to prevent XSS attacks. This includes form inputs, search queries, comments, usernames, and any data coming from external sources. Developers also use HTML encoding when embedding code snippets in documentation, creating email templates, or working with RSS feeds and XML documents.