SEO head QA
HTML Head Preflight Auditor
Paste a page HTML document and check launch-critical head tags before publishing.
Audit results
HTML lang attribute is set
CriticalThe root html element declares the page language.
enCharset is declared
CriticalThe head includes a charset declaration, ideally UTF-8.
utf-8Viewport meta is present
CriticalMobile rendering is controlled with a viewport meta tag.
width=device-width, initial-scale=1Title tag is present
CriticalThe page has one readable title tag.
Launch Checklist for Indie Websites | tboxioTitle length fits search results
RecommendedThe title is long enough to describe the page and short enough to avoid obvious clipping.
44 charsMeta description is present
CriticalThe page has a meta description for search and sharing snippets.
Run a practical pre-launch checklist for SEO, Open Graph, Schema, sitemap, tracking, email, performance, and assets before going live.Meta description length is useful
RecommendedThe description is specific and not obviously too short or too long.
134 charsCanonical URL is production-ready
CriticalA canonical link exists, uses HTTPS, and does not point to localhost or staging.
https://example.com/launch-checklistRobots meta allows indexing
CriticalThe page is not accidentally blocked with noindex.
index,followOpen Graph tags are complete
Recommendedog:title, og:description, og:image, and og:url are present.
completeTwitter Card tags are complete
Recommendedtwitter:card, twitter:title, twitter:description, and twitter:image are present.
completeJSON-LD structured data is valid
RecommendedStructured data scripts are present and parse as valid JSON.
1 JSON-LD script(s)Favicon is linked
RecommendedThe head includes an icon link for browser tabs and bookmarks.
/favicon.icoTheme color is set
OptionalA theme-color meta tag helps mobile browser chrome match the brand.
#4f46e5Extracted head data
- lang
- en
- title
- Launch Checklist for Indie Websites | tboxio
- description
- Run a practical pre-launch checklist for SEO, Open Graph, Schema, sitemap, tracking, email, performance, and assets before going live.
- canonical
- https://example.com/launch-checklist
- robots
- index,follow
- viewport
- width=device-width, initial-scale=1
- charset
- utf-8
- favicon
- /favicon.ico
- theme-color
- #4f46e5
- JSON-LD
- 1
Report preview
# Website HTML Head Preflight Report Score: 100/100 Passed: 14 Warnings: 0 Failed: 0 - โ HTML lang attribute is set โ en - โ Charset is declared โ utf-8 - โ Viewport meta is present โ width=device-width, initial-scale=1 - โ Title tag is present โ Launch Checklist for Indie Websites | tboxio - โ Title length fits search results โ 44 chars - โ Meta description is present โ Run a practical pre-launch checklist for SEO, Open Graph, Schema, sitemap, tracking, email, performance, and assets before going live. - โ Meta description length is useful โ 134 chars - โ Canonical URL is production-ready โ https://example.com/launch-checklist - โ Robots meta allows indexing โ index,follow - โ Open Graph tags are complete โ complete - โ Twitter Card tags are complete โ complete - โ JSON-LD structured data is valid โ 1 JSON-LD script(s) - โ Favicon is linked โ /favicon.ico - โ Theme color is set โ #4f46e5
Meta tag audit
Head Tag Checker
Paste a full HTML document or just a head section to check the tags that often decide how a page appears in search and social previews.
Title and description
Catch missing, duplicated, too-short, or weak metadata before the page is indexed.
Canonical and robots
Confirm canonical, robots, and JSON-LD signals do not contradict your launch goals.
Social preview readiness
Review Open Graph, Twitter Card, favicon, viewport, and language tags together.