Fix HTML Validation Errors

The Problem

Your page looks slightly wrong in one browser, a plugin or script refuses to behave, or a tool you use (an SEO checker, an embed widget) is throwing warnings — and the root cause is often invalid HTML the browser is silently trying to guess its way around.

About this problem

Browsers are very forgiving of broken HTML — an unclosed tag or a misplaced element usually still "renders", just not quite the way you intended, and differently across browsers. This matters more than it looks: invalid markup is a common hidden cause of layout quirks, broken JavaScript selectors, and accessibility tools misreading the page.

It tends to build up over time from copy-pasting content from Word or another site, page builders generating messy output, or manual edits that leave a tag unclosed somewhere in a long page.

What's Included

• Running your page through a proper HTML validator and reading past the noise to the errors that actually matter
• Fixing unclosed tags, invalid nesting, and duplicate IDs causing real problems
• Checking that the fix doesn't change your page's visual design
• A short note on what was wrong and why, so avoidable ones don't creep back in

What's NOT Included

• Full accessibility (WCAG) audits — that's a separate, deeper service
• Rewriting your page's HTML from scratch or redesigning it
• Fixing errors inside third-party embeds or widgets you don't control the code of

How It Works

1. Run the page through the W3C validator (or equivalent) and export the full list of errors and warnings.
2. Separate genuine structural problems (unclosed tags, invalid nesting, duplicate IDs) from validator noise that doesn't actually affect anything.
3. Fix each real issue directly in the page's HTML, checking the rendered result after each change.
4. Cross-browser spot check to confirm the fix resolves the inconsistency you originally noticed.
5. Re-validate to confirm the error count has genuinely dropped, not just moved.

In practice: you buy the service, send over whatever access or details the job needs, I investigate and do the work, and you confirm it's resolved before we call it done.

Frequently Asked Questions

Why does my website look different in Chrome and Firefox?

Invalid HTML is one of the more common causes — different browsers correct broken markup in slightly different ways, so the same invalid code can render inconsistently rather than failing outright.

Does HTML validation affect my Google ranking?

Not directly as a ranking factor, but validation errors can cause rendering or accessibility issues that do affect user experience signals Google does care about.

Can invalid HTML break my website completely?

Rarely completely, since browsers are forgiving, but it can break specific things — a script that can't find the element it's looking for, a layout that collapses unexpectedly, or a tool misreading your page.

Will fixing HTML errors change how my website looks?

The goal is to fix the underlying code without changing the visual design — any visible change is checked with you before being considered finished.

Why do validators show hundreds of errors on my page?

Often a handful of root causes (like one unclosed tag near the top of the page) cascade into dozens of reported errors below it — fixing the real cause usually clears most of the list at once.

Can page builders like Elementor or Divi cause HTML errors?

Yes, some page builders generate messy or duplicated markup behind the scenes, especially after rearranging content many times — this is fixed at the output level without needing to touch the builder itself.