🔍 Free SEO Audit Tool

Paste any page's HTML source and get a complete SEO audit in seconds. Checks title, meta description, headings, Open Graph, Twitter Card, Schema markup, canonical, alt text, links, and more. 100% browser-based — your HTML never leaves your device.

SEO Tools ✓ 100% Free ✓ No Signup ✓ HTML Never Sent to Server
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How to Use the SEO Audit Tool

1
Open the page you want to audit

Navigate to any webpage — your own site, a competitor page, or a blog post you want to check.

2
View the page source

Press Ctrl+U (Windows/Linux) or Cmd+U (Mac) to view the HTML source in a new tab.

3
Copy all and paste here

Press Ctrl+A then Ctrl+C to copy the source, then paste into the text area above.

4
Click Analyse SEO and review your score

Your full SEO audit appears instantly — a score out of 100, pass/fail checks, a Google SERP preview, keyword analysis, and prioritised recommendations.

Why Use This Free SEO Audit Tool?

Professional SEO audit tools cost $50-200 per month. This tool checks every critical on-page SEO factor that matters for Google rankings — completely free, with no account, no limit on audits, and no data leaving your browser. It is ideal for auditing your own pages before publishing, checking competitor pages for SEO gaps, verifying that recent changes were implemented correctly, and identifying quick wins on pages that are not ranking as expected. Because it analyses raw HTML rather than a live URL, it also works perfectly for auditing staging environments, password-protected pages, and local development sites that search engines cannot reach.

Frequently Asked Questions

How do I get the HTML source of a page?
Open the page in your browser and press Ctrl+U (Windows/Linux) or Cmd+U (Mac). A new tab opens showing the raw HTML source. Press Ctrl+A to select all, Ctrl+C to copy, then paste into this tool. Alternatively, right-click anywhere on the page and choose View Page Source.
Is my HTML sent to a server when I analyse it?
No. All analysis runs entirely in your browser using JavaScript. The HTML you paste is never transmitted to any server. This makes the tool safe for auditing internal, staging, confidential, or password-protected pages. You can verify this by opening browser DevTools (F12), going to the Network tab, and observing that no external requests are made when you click Analyse.
What SEO checks does the tool perform?
The tool checks: Title tag (length 50-60 chars), meta description (length 120-150 chars), single H1 presence, H2 heading structure, canonical tag, robots meta, viewport meta, Open Graph tags (og:title, og:description, og:image, og:url, og:type), Twitter Card tags, JSON-LD Schema markup, image alt text coverage, internal vs external link ratio, word count, keyword density, and performance hints (inline CSS/JS, script placement).
Can I audit competitor pages?
Yes. Navigate to any public competitor page, press Ctrl+U to view source, copy all the HTML, and paste it here. You get the same comprehensive SEO analysis of their page that you would for your own — useful for identifying SEO gaps and opportunities.
What SEO score should I aim for?
Aim for 80 or above. Scores 80-100 indicate a well-optimised page with no critical issues. Scores 60-79 mean important improvements are needed. Scores below 60 indicate critical SEO problems that are likely suppressing your rankings. A perfect 100 is rarely achievable because some checks are contextual, but 85-95 is realistic for any well-built page.
How is this different from Rank Math or Yoast?
Rank Math and Yoast are WordPress plugins that integrate directly into your CMS. This tool is CMS-agnostic — it works with any website built on any platform (WordPress, Shopify, Wix, hand-coded HTML, Webflow, etc.). It also works on competitor sites and pages you do not own. No plugin installation is required.

About the SEO Audit Tool

This SEO Audit Tool performs on-page SEO analysis by parsing raw HTML in your browser. It uses a weighted scoring system across four categories: Basic SEO (title, description, headings, keywords, links, word count), Advanced SEO (canonical, robots, viewport, structured data, Open Graph), Social Media (Twitter Card, og:image), and Performance (script placement, inline CSS, image optimisation). Each check is weighted by its relative impact on search rankings based on Google's publicly documented ranking factors and SEO best practices from Google Search Central. The tool is designed to give actionable, specific recommendations rather than vague scores — every failing check includes an explanation of what to fix and why it matters.

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