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FontSwap vs Kernline

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

FontSwap compared with Kernline
DetailFontSwap logo FontSwapKernline logo Kernline
What it doesFree Chrome extension to detect fonts on any website, find free alternatives, and swap them live Give your AI the exact component from any site, not a screenshot
StageNot given Not given
FoundedNot given Not given
Based inNot given ZA
Pricing modelFree Freemium
PricingNot given Free: $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.
Key features
  • Canvas-based font detection on any page
  • Premium font flagging with free alternative matching
  • Live font swapping with instant undo
  • Font inspector showing computed properties
  • Highlight font usage across page elements
  • Export results as Markdown, JSON, or CSS
  • WCAG contrast ratio audit
  • Font performance metrics tracking
  • Works on any website including authenticated pages
  • No account or sign-up required
  • 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
What makes it different
  • No account or data collection required
  • Works on any website instantly without installation beyond the extension
  • High accuracy font detection using DOM computed properties
  • Completely free with no premium tier or ads
  • Changes are local only and changes persist in your browser session
  • 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
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)3 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)70
Citation Flow (Majestic)250
Referring domains (Majestic)300

4 details filled in for both companies.

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