Meta Tag Checker & SERP Snippet Previewer
Inspect your page's <title>, meta description, canonical URL, robots directives, Open Graph, and Twitter preview cards with instant display guidance.
1. Paste HTML Source Code
How to get HTML source from any website:
- Open the page you want to inspect in your web browser.
- Right-click anywhere and select "View Page Source" (or press Ctrl + U / Cmd + Option + U).
- Select all text (Ctrl + A) and copy it (Ctrl + C).
- Paste the code into the box above and click Analyze HTML.
Why paste instead of entering a URL? Browsers prevent websites from reading third-party pages directly (CORS security). By pasting your HTML, the audit remains completely private, runs at instantaneous speed, and does not depend on remote proxy servers.
Ready for HTML Analysis
Paste your HTML source code on the left and click "Analyze HTML" or click "Load Sample HTML" to try an example immediately.
Why Meta Tags Matter for Modern Technical SEO
Meta tags are HTML snippets placed in the <head> section of a webpage that communicate directly with search engines, social media platforms, and web browsers. While Google uses over 200 ranking signals, well-configured meta tags establish clarity, protect against duplicate content penalties, and optimize click-through rates.
Title Tag
The single most important on-page meta tag. Appears as the clickable blue link in Google search results and defines browser tab labels. Recommended ~30–60 characters.
Meta Description
Provides a concise summary displayed beneath the title in search snippets. A persuasive description (~120–160 characters) directly influences click-through rates.
Canonical Tag
Prevents duplicate content issues by explicitly declaring the master, authoritative URL of the page. Crucial when pages can be accessed with multiple URL parameters.
Robots Directives
Controls whether search engines are allowed to index the page or follow links. Remember: noindex instructs search engines to remove the page from search results.
Frequently Asked Questions
Why do I have to paste HTML instead of just entering a URL?
Web browsers enforce Cross-Origin Resource Sharing (CORS) security restrictions, preventing client-side code from silently fetching source code from other domains. Operating 100% inside your browser ensures absolute privacy and zero tracking without requiring paid backend proxy servers.
Does achieving a 100% checklist score guarantee a #1 Google ranking?
No. Search engines rank pages based on relevance, content quality, backlinks, domain reputation, and hundreds of other factors. This tool verifies on-page technical tag formatting and display limits, but cannot guarantee search rankings.
What is the difference between robots.txt and meta robots directives?
robots.txt instructs search bots on which URLs they are permitted to crawl (fetch). Meta robots directives (like noindex) instruct search engines on how to handle the page in search results. A page blocked by robots.txt can still be indexed if linked externally, while a crawlable page with meta noindex will be omitted from the search index.
What are the recommended title and meta description lengths?
For title tags, 30 to 60 characters is standard to avoid truncation on typical 600px search displays. For meta descriptions, 120 to 160 characters provides a helpful summary. Google does not enforce strict limits and frequently customizes snippets depending on user search queries.
Does having multiple H1 headings harm SEO?
Google Search Central has clarified that multiple H1 elements are valid HTML5 and will not trigger an algorithmic penalty. However, using a single clear H1 remains standard best practice for screen readers and clean content hierarchy.