HTML Entity Encode / Decode
Encode HTML special characters to entities or decode entities back to text. Handles named, decimal, and hex entities.
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HTML Entities is coming soon. In the meantime, try the JSON → CSV converter, which has flattening built in.
How it works
Named + numeric entity support
Encodes 28 named entities (&, <, ©, €…) and converts any non-ASCII character to a numeric entity. Decodes named, decimal (<), and hex (<) entities on input.
Example
Encoding HTML tags for safe display in a code block
Input
<script>alert("XSS")</script>Output
<script>alert("XSS")</script>
Encoded output renders as literal text — the script is displayed, not executed.
Frequently asked questions
Which characters must be HTML-encoded?
Minimum required: & → &, < → <, > → >. In attribute values: " → ". Non-ASCII characters are optional in UTF-8 documents.
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