Skills Guide

Meta Tags Validator

VerifiedCaution

Analyze and validate meta tags on web pages for SEO and social sharing. Detects missing titles, insufficient descriptions, duplicate tags, and Open Graph issues.

Sby Skills Guide Bot
ContentBeginner
406/2/2026
Claude Code
#seo#meta-tags#validation#open-graph

Recommended for

Claude CodeUI/UX designerProduct managerSEO & contentWriter / marketerSolo / indie hacker

Our review

Analyzes and validates meta tags on web pages for SEO and social sharing.

Strengths

  • Identifies missing tags like title, description, and canonical URL.
  • Checks Open Graph and Twitter card tags for social media optimization.
  • Provides actionable recommendations to fix issues.

Limitations

  • Only checks meta tags, not performance or content quality.
  • May not catch all issues like malformed tags.
  • Works only on publicly accessible URLs.
When to use it

When you need to quickly audit a page's meta tags for SEO and social sharing readiness.

When not to use it

For a comprehensive site audit that includes performance, accessibility, or content analysis.

Security analysis

Caution
Quality score88/100

The skill runs a Bun script with a user-supplied URL as argument in a Bash environment. If the agent does not properly quote the URL, shell metacharacters (e.g., ;, &&, |) could lead to unintended command execution. The script itself appears safe, but the lack of guidance on input handling introduces risk.

Findings
  • •URL argument passed to shell command without explicit quoting or sanitization, potentially allowing command injection if user input contains shell metacharacters.

Examples

Basic meta check
Check the meta tags on https://example.com
Verbose audit
Audit the meta tags of https://example.com with full details
JSON output
Analyze the SEO meta tags on https://example.com and give me the raw data

name: check-meta description: Analyze and validate meta tags on web pages. Use when users ask to check meta tags, verify SEO tags, audit page titles, check Open Graph tags, verify canonical URLs, or analyze social sharing tags. Detects missing title, description issues, duplicate tags, and Open Graph problems. argument-hint: [URL] allowed-tools: Bash(bun:*), Read, WebFetch

Check Meta

Analyze and validate meta tags on web pages for SEO and social sharing.

Quick Start

cd /path/to/html-checker/scripts
bun src/check-meta.ts <URL>

CLI Options

| Option | Short | Default | Description | |--------|-------|---------|-------------| | --verbose | -v | false | Show all meta tags found | | --json | -j | false | Output results as JSON |

Checks Performed

| Check | Severity | Description | |-------|----------|-------------| | Missing title | Error | Page has no title tag | | Title too short | Warning | Title under 30 characters | | Title too long | Warning | Title over 60 characters | | Missing description | Error | No meta description | | Description too short | Warning | Description under 50 characters | | Description too long | Warning | Description over 160 characters | | Missing canonical | Warning | No canonical URL specified | | Missing og:title | Info | No Open Graph title | | Missing og:description | Info | No Open Graph description | | Missing og:image | Info | No Open Graph image | | Missing twitter:card | Info | No Twitter card meta | | Duplicate meta | Warning | Same meta tag appears twice |

Usage Examples

# Basic check
bun src/check-meta.ts https://example.com

# Verbose output
bun src/check-meta.ts https://example.com --verbose

# JSON output
bun src/check-meta.ts https://example.com --json

Output Example

Meta Analysis for https://example.com

Title: "Example Domain" (14 chars)
Description: "This domain is for use in illustrative examples..." (156 chars)

SEO Tags:
  [OK] title: Example Domain
  [OK] description: This domain is for...
  [MISSING] canonical

Open Graph:
  [MISSING] og:title
  [MISSING] og:description
  [MISSING] og:image

Twitter:
  [MISSING] twitter:card
  [MISSING] twitter:title

Issues Found: 5
  [WARNING] Title too short (14 chars, min 30)
  [WARNING] Missing canonical URL
  [INFO   ] Missing og:title
  [INFO   ] Missing og:image
  [INFO   ] Missing twitter:card

Recommendations:
  - Expand title to 30-60 characters
  - Add canonical URL to prevent duplicate content
  - Add Open Graph tags for social sharing

SEO Best Practices

  • Title: 30-60 characters, include primary keyword
  • Description: 50-160 characters, compelling call-to-action
  • Canonical: Always specify to prevent duplicate content
  • Open Graph: Essential for social media sharing

Related Files

  • Command: plugins/html-checker/commands/check-meta.md
  • Scripts: plugins/html-checker/scripts/src/check-meta.ts
  • Check Headings: plugins/html-checker/skills/check-headings/
  • Check Performance: plugins/html-checker/skills/check-performance/
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