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Code Review

What it does

Scans site source code for SEO issues — missing meta tags, Schema markup errors, render-blocking resources and JavaScript problems.

Technical SEO errors hidden in source code are killing your rankings — and you don't know about them

Most SEO tools analyze the visible content on a webpage, but many critical SEO issues are hidden in the source code. Missing or incorrect meta tags, broken Schema markup, render-blocking JavaScript and CSS, errors in hreflang implementation, and problems with canonical tags — all of this affects your rankings but is invisible to regular SEO tools. Developers understand code but not SEO, and SEO specialists understand SEO but not code. The result is that technical SEO errors remain undetected and never get fixed.

• Meta tags that are missing, duplicated or have wrong content — invisible without code analysis
• Schema markup with syntax errors or missing required fields that Google can't interpret
• Render-blocking JavaScript and CSS that delays page loading and hurts Core Web Vitals
• Hreflang and canonical errors that confuse Google about which page should rank

Automatic code analysis that finds all SEO issues in source code — with prioritized fixes

Code Auditor scans the website's source code line by line and identifies all SEO-related issues. The tool analyzes HTML structure, meta tags, Schema markup, JavaScript rendering, CSS loading, hreflang implementation, canonical tags and much more. Each issue gets a severity rating and a concrete fix with code examples — so developers can implement changes immediately without needing SEO knowledge.

• Meta tag analysis: checks all meta tags for correctness, duplicates and missing elements
• Schema validation: validates all Schema markup against Google's requirements with specific error messages
• Render analysis: identifies render-blocking resources and suggests optimization
• Code fixes: generates concrete code examples for each error — ready for implementation

Features

• JavaScript rendering: analyzes how JavaScript affects SEO — client-side vs server-side rendering
• Core Web Vitals connection: links code errors directly to Core Web Vitals impact with estimated improvement
• Batch scanning: scan entire website or specific pages to find patterns in code errors
• Developer-friendly report: generates reports with code examples developers can use directly

How it works

1. Enter the URL of the page or website you want to analyze for SEO code errors
2. Code Auditor scans the source code and identifies all SEO issues with severity and code fixes
3. Share the developer-friendly report with the team and implement fixes prioritized by impact

Use cases

• SEO specialists wanting to identify technical code errors without being able to read code themselves
• Developer teams needing SEO-specific code reviews with concrete fixes and code examples
• Agencies wanting to deliver technical SEO audits with developer-friendly reports to clients' dev teams

Why use Code Auditor?

Technical SEO is the foundation everything else builds on. You can have the best content and strongest backlinks, but if the source code has errors preventing Google from understanding and indexing your pages correctly, you'll never rank as high as you should. Code Auditor uncovers these hidden errors that regular SEO tools don't catch.

The biggest problem in technical SEO is the communication gap between SEO specialists and developers. The SEO specialist knows something is wrong but can't point to exactly which code line needs changing. The developer can fix code but doesn't know what's important for SEO. Code Auditor bridges these two worlds by generating reports both sides understand — with both SEO context and concrete code fixes.

For Nordic websites, this is especially relevant because many use multilingual setups with hreflang tags, which are notoriously difficult to implement correctly. Code Auditor validates your hreflang implementation and catches errors that could cause the wrong language version to appear in search results — a common problem for Nordic websites serving Norway, Sweden, Denmark and Finland.

FAQ

What programming languages and frameworks does Code Auditor support?

Code Auditor analyzes HTML, CSS and JavaScript regardless of framework. The tool handles React, Next.js, Vue, Nuxt, Angular, Svelte, WordPress, Shopify and all other platforms that generate HTML. For JavaScript-heavy sites (SPAs), the tool analyzes both the original HTML and the rendered DOM to catch issues only visible after JavaScript execution.

How does this differ from regular SEO crawlers?

Regular SEO crawlers like Screaming Frog and Ahrefs analyze the rendered page — what the user sees. Code Auditor goes deeper and analyzes the source code itself. This uncovers issues crawlers don't catch: Schema markup syntax errors, render-blocking resources that delay rendering, JavaScript errors preventing content from being indexed, and subtle errors in hreflang and canonical implementation only visible in the code.

Do my developers need SEO knowledge to use the report?

No — that's the whole point of Code Auditor. The report is designed for developers who don't have SEO knowledge. Each issue is explained with technical context (what's wrong in the code), SEO context (why this affects rankings), and a concrete code fix (exactly what needs to change). Developers can implement fixes directly from the report without needing to understand the SEO theory behind it.

Can I scan the entire website or just individual pages?

Both. You can scan individual pages for detailed analysis, or run a batch scan of the entire website to find patterns. Batch scanning is especially useful because it identifies systemic issues — for example if all product pages are missing the same Schema field, or if a specific page template has render-blocking resources. This gives you a prioritized list of fixes affecting the most pages.

How often should I run a code audit?

We recommend running Code Auditor after every major code update or deploy, and minimum monthly as a routine check. Code errors can be introduced at any time — a new plugin, a design change, or a developer update can inadvertently break Schema markup, remove meta tags, or introduce render-blocking resources. Regular scanning ensures new errors are caught quickly before they affect rankings.

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