ランディングページ監査ツール -- 27項目のSEO、OG&パフォーマンスチェック

HTMLソースコードを貼り付けるだけで、SEO、ソーシャル共有、パフォーマンス、セキュリティ、コンバージョン最適化の即時監査を取得。発見された問題ごとに具体的な改善提案を提供。

All analysis happens in your browser. No HTML content is sent to any server.

How It Works

1

Copy Your Page Source

Right-click on your landing page, select "View Page Source", then copy all the HTML code (Ctrl+A, Ctrl+C or Cmd+A, Cmd+C).

2

Paste & Analyze

Paste the HTML into the text area above and click "Analyze Landing Page". The audit runs instantly in your browser.

3

Review & Optimize

Check your score across 5 categories, review pass/fail results for each item, and follow the recommendations to improve your page.

Why Audit Your Landing Page?

Catch SEO Issues Fast

Missing title tags, broken meta descriptions, and poor header hierarchy silently kill your search rankings. Catch problems before search engines do.

Privacy-First, Browser-Only

Your HTML source code never leaves your browser. No data is uploaded, no account required, no API calls. 100% private and offline-capable.

Actionable Recommendations

Every failed check comes with a specific fix. No vague suggestions. Know exactly what to add, change, or remove for immediate improvement.

Landing Page Audit is a free, browser-based HTML analysis tool by Aibrify that checks your landing page for SEO, Open Graph, performance, security, and CTA issues without uploading data to any server. Built for social media marketers and web developers who need fast, private landing page optimization checks.

Why Every Landing Page Needs an Audit

A landing page is often the first point of contact between your business and potential customers. Whether it comes from a paid ad, organic search, or social media share, the landing page must instantly communicate value and guide visitors toward conversion. Yet many landing pages fail silently - missing critical SEO tags, broken social sharing previews, or lacking clear calls to action that cost businesses conversions every day.

Regular auditing catches these issues before they impact your bottom line. Our free landing page audit tool checks 25+ critical elements across five categories, giving you an instant health score and specific recommendations for improvement.

The Five Pillars of a High-Converting Landing Page

1. SEO Essentials

Search engine optimization starts with the basics: a compelling title tag (30-60 characters), a persuasive meta description (70-160 characters), proper viewport configuration for mobile, and a clean heading hierarchy. The H1 should clearly state what the page is about, and there should be only one per page. A canonical link prevents duplicate content issues, and the lang attribute helps search engines serve your page to the right audience.

2. Open Graph and Social Sharing

When someone shares your landing page on Facebook, LinkedIn, or Twitter, Open Graph tags control the preview card. Without og:title, og:description, and especially og:image (ideally 1200x630px), your shared links look plain and unprofessional, dramatically reducing click-through rates from social channels.

3. Performance and Assets

Page load speed directly impacts conversion rates. Every additional second of load time can reduce conversions by up to 7%. This audit checks for excessive external CSS and JavaScript files, inline styles that prevent caching, missing image alt text (which also hurts SEO), and the presence of JSON-LD structured data for rich search results.

4. Security and Encoding

Modern landing pages must use HTTPS for all resources. Mixed content (HTTP resources on an HTTPS page) triggers browser warnings that destroy visitor trust. Proper character encoding (UTF-8) prevents text rendering issues, and rel="noopener" on external links prevents the tabnabbing security vulnerability.

5. CTA and Conversion Elements

The ultimate purpose of a landing page is conversion. This audit detects form elements, CTA buttons with action-oriented text, and contact information (email, phone, physical address). Landing pages without clear conversion paths leave money on the table.

How to Improve Your Landing Page Score

  • Fix all "Fail" items first - these are critical issues like missing title tags or meta descriptions that have the biggest impact on search visibility.
  • Address "Warning" items next - these are optimization opportunities like title length, missing canonical links, or excessive inline styles.
  • Add Open Graph tags - even a basic set of og:title, og:description, and og:image dramatically improves social sharing performance.
  • Ensure at least one clear CTA - every landing page needs an obvious next step for the visitor, whether it is a signup form, contact button, or purchase link.
  • Re-audit after changes - paste your updated HTML to verify improvements and aim for a score above 80.

Frequently Asked Questions

How do I get the HTML source code of my landing page?
Right-click anywhere on your page and select "View Page Source" to see the raw HTML. Select all (Ctrl+A or Cmd+A), copy (Ctrl+C or Cmd+C), and paste it into the tool. This works in Chrome, Firefox, Edge, and Safari.
Why paste HTML instead of entering a URL?
Pasting HTML keeps your data completely private since nothing is sent to any server. It also works for pages behind logins, staging environments, and localhost development sites that a URL-based scanner cannot reach.
What does the overall score mean?
The score is a 0-100 weighted aggregate across five categories: SEO, Open Graph, Performance, Security, and CTA. Each check item contributes equally within its category. A pass scores full points, a warning scores half, and a fail scores zero.
What SEO elements does the tool check?
The tool checks seven core SEO elements including title tag, meta description, viewport, and heading structure. Specifically, it verifies title tag presence and length (30-60 chars ideal), meta description presence and length (70-160 chars), canonical link, H1 heading existence and uniqueness, header hierarchy (no level skipping), and the HTML lang attribute.
What Open Graph tags should my landing page have?
At minimum, include og:title, og:description, og:image (1200x630px recommended), and og:url. Adding twitter:card ensures your page also previews correctly on Twitter/X. These tags control how your page appears when shared on social media platforms.
How does the CTA detection work?
The tool scans for buttons, submit inputs, and links containing call-to-action text like "Sign Up" or "Buy Now". It also checks for form elements and contact information (email, phone, address) as conversion signals.
Does this tool check page speed or load time?
No, but it analyzes HTML structure for performance indicators like external CSS/JS file count, inline styles, and image alt text coverage. For actual load time testing, use tools like Google PageSpeed Insights or WebPageTest in addition to this audit.
Is this tool free to use?
Yes, completely free with no limits, no signup, and no data collection. All processing runs in your browser using the DOMParser API. You can use it as many times as you want on any page.
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最終更新: 2025-03-17 · Aibrifyチームが構築・運営 — 10,000+のマーケターが利用

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