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Developer SEO Utility

SEO Head Checker

Paste HTML head code to check title, description, canonical, robots, Open Graph, and Twitter Card tags in one place.

Basic SEO tag check Check whether title, meta description, and canonical URL exist and are in a recommended state.
Social sharing tag check Check missing Open Graph and Twitter Card tags to improve shared preview quality.
Improvement report Review missing tags, length issues, noindex settings, and items that need fixes.

HTML Head Input

Paste the <head> section code of the HTML you want to check.

Basic meta check Prioritize title, description, canonical, and robots tags that are important for search results.
Share preview check Check og:title, og:description, and og:image tags used by KakaoTalk, social media, and messengers.
Title 0 chars Description 0 chars Meta tags 0 items Waiting to check
SEO Head score 0 pts

Enter head code and run the check.

0%

Check result

Review important SEO tags by good, warning, and error status.

Ready
No check result yet.

Detailed report

Copy or download the check result as an SEO fix checklist.

Enter HTML head code and click the SEO Head check button.

SEO Head check items

Review key tags that affect search visibility and social sharing quality.

Basic search tags

title, description, canonical, and robots relate to search result title, description, representative URL, and indexing behavior.

Open Graph tags

og:title, og:description, og:image, and og:url are used for KakaoTalk and social sharing card previews.

Twitter Card tags

twitter:card, twitter:title, twitter:description, and twitter:image improve X/Twitter share preview quality.

Help

What is SEO Head Checker?

SEO Head Checker is a free developer SEO utility that checks whether the HTML head section contains required meta tags for search engines and social sharing.

Use it to check missing SEO tags in blog posts, landing pages, utility pages, product pages, and Django templates.

Features

  • Check whether the title tag exists and whether its length is appropriate
  • Check whether meta description exists and whether its length is appropriate
  • Check whether canonical URL exists and whether it is an absolute URL
  • Detect robots noindex and nofollow settings
  • Check missing Open Graph tags
  • Check missing Twitter Card tags
  • Copy results and download a report

Use cases

  • Check SEO tags before publishing a blog post
  • Find missing meta tags on utility pages
  • Diagnose KakaoTalk share preview issues
  • Check missing canonical URLs or duplicate URL issues
  • Detect accidental noindex settings
  • Review default SEO settings in site templates
Why is the title tag important?

The title acts as the main title shown in search results. It should be unique for each page, and overly short or long titles may be less useful or truncated.

How long should meta description be?

A natural summary of about 80 to 160 characters is generally recommended. Search engines may not always display it exactly, but it helps describe the page.

When is a canonical tag needed?

When the same content can be accessed through multiple URLs, the canonical tag tells search engines the representative URL and helps reduce duplicate URL issues.

Do Open Graph tags directly affect SEO?

Open Graph tags affect social and messenger preview quality more directly than search ranking. They help titles, descriptions, and images appear correctly when links are shared.

What happens if robots noindex is present?

A robots meta tag with noindex tells search engines not to index the page. If it is accidentally added to a public page, search visibility may be limited.

Is this tool enough for a complete SEO check?

This tool is a helper for quickly checking meta tags in the head section. Actual search visibility is also affected by content quality, internal links, page speed, crawl status, site structure, and search engine evaluation.