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Free AMP Validator Tool | Validate AMP HTML Pages Online | Horizontal Solution
Free SEO Tool — No Sign-Up Required

AMP Validator

Validate your AMP HTML pages for Google compliance. Detect AMP errors and warnings to ensure your mobile pages load instantly and rank better in Google mobile search results.

Enter the full URL of your AMP page to check for compliance errors.

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AMP Validation Result

Free AMP Validator — Ensure Your AMP Pages Meet Google Standards

AMP (Accelerated Mobile Pages) is an open-source framework created by Google to enable web pages to load near-instantly on mobile devices. AMP pages use a restricted subset of HTML, Google's AMP JavaScript library, and Google's AMP Cache CDN to deliver lightning-fast mobile web experiences. Validating your AMP pages ensures they meet Google's strict HTML specifications and qualify for AMP-specific benefits in search results.

Our free AMP Validator checks your AMP HTML code against the official AMP specification, identifying errors and warnings that need to be fixed before your pages can fully benefit from AMP technology.

Why AMP Validation Matters for SEO

  • AMP Cache eligibility: Only valid AMP pages are served from Google's AMP Cache CDN — pages load from Google's servers, providing the fastest possible delivery to mobile users
  • Core Web Vitals improvement: Valid AMP pages consistently achieve excellent LCP (Largest Contentful Paint) and FID (First Input Delay) scores — both direct Google ranking factors
  • Lightning bolt icon: Valid AMP pages display the ⚡ lightning bolt icon in Google mobile search results, signaling fast loading to users and increasing click-through rates
  • Top Stories carousel: For news publishers, valid AMP is required to appear in Google's Top Stories carousel in mobile search results — one of the highest-visibility positions in Google
  • Reduced bounce rates: AMP pages load 4x faster than standard mobile pages, dramatically reducing bounce rates and improving user engagement signals

Common AMP Validation Errors

  • Missing AMP boilerplate: Every AMP page must include the exact AMP boilerplate CSS code in the <head> section — missing or modified boilerplate causes validation failure
  • Missing ⚡ attribute: The <html amp> or <html ⚡> attribute is required to identify the page as AMP
  • Prohibited tags: AMP disallows standard <script> tags (except AMP framework scripts), <frame>, <frameset>, and certain <form> usages
  • External stylesheets: AMP only allows one <style amp-custom> block for custom CSS (max 75KB) — external CSS files are not permitted
  • Non-AMP images: Standard <img> tags must be replaced with <amp-img> components with explicit width and height attributes
  • Layout violations: AMP requires explicit width/height on all media elements to prevent layout shifts during loading

AMP HTML Required Structure

Every valid AMP page must include these essential elements:

  • <html ⚡> or <html amp> attribute on the html element
  • <meta charset="utf-8"> as the first element in <head>
  • <meta name="viewport" content="width=device-width">
  • The AMP boilerplate style and noscript tags
  • <script async src="https://cdn.ampproject.org/v0.js"></script>
  • A canonical link pointing to the regular (non-AMP) version of the page

Frequently Asked Questions — AMP Validator

  • What is AMP (Accelerated Mobile Pages)?

    AMP is an open-source HTML framework created by Google that enables web pages to load near-instantly on mobile devices. AMP pages use a restricted subset of HTML, a custom JavaScript library, and Google's AMP Cache CDN to deliver lightning-fast mobile web experiences.

  • Why should I validate my AMP pages?

    Invalid AMP pages won't be served from Google's AMP Cache, won't display the ⚡ lightning bolt icon, and may not appear in Google's Top Stories carousel — missing out on significant mobile search visibility and traffic.

  • Does AMP improve Google SEO rankings?

    AMP pages often achieve excellent Core Web Vitals scores — especially LCP and FID — which are direct Google ranking factors. While AMP itself is not a standalone ranking signal, the speed benefits translate to better rankings through improved Core Web Vitals.

  • What common errors does the AMP Validator detect?

    Common AMP errors include: missing mandatory boilerplate code, prohibited HTML tags like script elements, invalid attribute values, missing amp-img dimensions, incorrect AMP component loading, and layout specification errors.

  • Is this AMP Validator tool free?

    Yes. Our AMP Validator is 100% free with no registration required. Validate your AMP pages by URL or by pasting HTML code directly — unlimited use, no signup.