HTML Entity Escaper
Convert text to and from HTML entities, live as you type. Escape mode handles the five characters that matter; unescape mode decodes named, numeric and hex references, which is what machine-generated HTML actually contains. Output is written with textContent, so your input is never rendered. Runs fully client-side. Imported Claude artifact. Source: https://github.com/simonw/tools (escape-entities.html, Apache-2.0).
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System prompt (SKILL.md)
---
name: html-entity-escaper
description: Convert text to and from HTML entities, live as you type, in either direction.
metadata:
tags:
- artifact-import
- dev-tools
source_url: https://tools.simonwillison.net/escape-entities
github_repo_url: https://github.com/simonw/tools
---
# HTML Entity Escaper
An imported Claude artifact with two modes. Escape turns the five characters
that matter - ampersand, angle brackets, double quote, apostrophe - into their
named entities, so a snippet can be dropped into markup without being parsed as
markup. Unescape goes the other way, and handles more than the named set: it
also decodes numeric references and hex references, which is what you usually
find in machine-generated HTML.
The conversion runs as you type and the result is written with textContent, so
the tool never renders your input - useful, given that pasting live markup into
an escaping tool is the whole point.
Nothing is uploaded, no model is called, and nothing is metered.
Release files (files)
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