SEO Structure Sniffer
Quickly analyze pasted HTML for basic on-page SEO structure: heading counts (H1, H2, H3), missing image alt text, and internal/external link counts. Paste HTML source code below to get a quick analysis.
Paste HTML on the left to see analysis.
H1 Tag:
A page should ideally have exactly one <h1> tag representing the main topic or title. Warnings appear if zero or more than one is found.
Heading Hierarchy [H2-H6]:
Headings should create a logical outline. Levels should not be skipped (e.g., using an <h3> directly after an <h1> without an intermediate <h2>). This tool checks for direct level skips.
Image Alt Text:
All relevant images (<img> tags) should have descriptive alt text for accessibility and search engines. Purely decorative images can use an empty alt="". This tool checks for missing or empty `alt` attributes.
Internal/External Links:
Checks the ratio of links pointing within the same domain versus linking out. A good internal structure helps navigation and distributes link equity. Accurate classification requires providing the Base URL.
Note: This tool provides basic structural checks. Comprehensive SEO involves many other factors like content quality, keywords, site speed, backlinks, mobile-friendliness, and technical setup.
Learn more at Google Search Central