What was Doctor HTML?
Doctor HTML was an early web-page checking service associated with Imagiware. An archived November 1996 page shows a form for submitting a page URL and selecting checks covering document structure, images, tables, links, forms and spelling.
The original page credits Thomas Tongue and Imagiware. A historical W3C tools directory also lists Doctor HTML and describes its checks. That listing documents the earlier tool; it is not an endorsement of the current website.
What is available at RxHTML today?
The current HTML Checkup is a new implementation at the familiar address. The present site does not claim to have created the original Doctor HTML or to continue its old software business.
You can paste HTML for a check in your browser, or enter a public page URL to retrieve its source through our server. The checker looks for selected issues such as missing page metadata, repeated IDs, image alternative-text attributes, form labels and heading structure. Findings explain what to review and why it may matter.
- Start with one representative page and choose pasted HTML or a public URL.
- Read each observation alongside the actual content; some suggestions depend on context.
- Edit your page, check it again, and test how it behaves in a browser.
Our HTML checkup guide explains common findings, including image alternatives and form labels.
Does a clear report prove that a page is correct?
No. This tool checks selected source patterns. It does not run the page’s JavaScript, inspect visual layout, crawl every linked page, or certify accessibility. A browser can also repair malformed markup while parsing it, so a source check may miss syntax problems.
For broader HTML checking, use the separate Nu HTML Checker. Combine automated findings with keyboard, zoom and assistive-technology testing appropriate to your audience. The web resources guide points to standards and practical accessibility tutorials.
What happened to Doctor HTML Pro and the old licenses?
The October 2000 tools page described Doctor HTML Pro as a commercial service for batch and scheduled checks. Earlier pages also discussed intranet licensing and Site Doctor.
Those historical products, subscriptions and licenses are not offered by the current Imagiware site. We do not provide the original binaries, old account access or support for those licenses. Current HTML Checkup is free to use without an account.
What should I do with an old CGI link?
Open the current checker and enter the page you want to examine. Old CGI addresses may contain settings or a page URL from decades ago; those parameters are not an instruction to run a new check. Review the target before submitting it.
For more about the earlier website, visit Imagiware’s domain history. Archive captures show what appeared on particular dates; they do not establish uninterrupted ownership or operation.