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Kernline vs Content SEO Check

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Kernline compared with Content SEO Check
DetailKernline logo KernlineContent SEO Check logo Content SEO Check
What it doesGive your AI the exact component from any site, not a screenshot See your page's SEO structure in one click
StageNot given Not given
FoundedNot given Not given
Based inZA Not given
Pricing modelFreemium Free
PricingFree: $0 with 3 Copy for AI and 3 Component captures a day. Pro yearly: $36/year ($3/month). Pro monthly: $6/month. Lifetime Pro: $59 one-time payment. Not given
Key features
  • Component capture as HTML, React, or Vue with Tailwind
  • Tailwind v3 and v4 class export
  • Design token export as CSS variables or Tailwind theme
  • CSS inspector with box model and typography
  • Asset list for images, SVGs, icons, and fonts
  • Pixel-perfect mockup overlay with layers
  • Single-element or full-page Tailwind scanning
  • Offline inspection and copy functionality
  • Analyze headings (H1–H6) with structure warnings
  • Internal link checker with anchor text and destination URLs
  • External link audit with rel attributes
  • In-content link analysis with word count
  • Clean Markdown export with filtered content
What makes it different
  • Works entirely in your browser with no page uploads or tracking
  • Runs only on the tab you open and never uploads the page
  • No ads, tracking, or data selling
  • Copy real styles and tokens from live websites instead of screenshots
  • No account or login required
  • Completely free to download and use
  • Analyzes locally without sending data externally
  • Five focused tools in one lightweight extension
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check45 no change since last check
Trust Flow (Majestic)017
Citation Flow (Majestic)031
Referring domains (Majestic)0161

4 details filled in for both companies.

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