HTML Kit site requirements.

HTML editor / FAQ
HomeHTML-Kit downloadsAdd-ins that update and extend HTML-Kit's capabilitiesSoftware and authoring support channelsRegister -- download add-ons and support HTML-KitOnline tools for HTML-Kit users
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Do I need HTML-Kit to use this tool?

Not at all, HTML-Kit is not required.
It's hosted on the HTML-Kit site because the first version was written for HTML-Kit users, but now it's open to everyone.