shouldiuse.io

Comparison

CommonMark vs GitHub Flavored Markdown (GFM)

Pick CommonMark when

  • Developers embedding Markdown rendering in apps
  • Docs and API platforms needing one consistent parser
  • Teams standardizing Markdown across tools

When CommonMark is not a fit

  • Non-technical teams wanting a writing app
  • Anyone needing tables or footnotes out of the box
  • Buyers expecting vendor support or SLAs
  • Apps that can't sanitize HTML output

Sources

  1. CommonMark (official site)commonmark.org
    official
  2. CommonMark Specspec.commonmark.org
    official
  3. CommonMark spec and reference implementations . GitHubgithub.com
    official
  4. We're switching to CommonMark . Stack Exchange Metameta.stackexchange.com
    news
  5. Standard Markdown is now Common Markdown . Coding Horrorblog.codinghorror.com
    news
  6. CommonMark is a Useful, High-Quality Project . Redditreddit.com
    review
  7. CommonMark vs GFM (2026): Tables Extensionformatarc.com
    review
  8. XSS vulnerability in Attributes extension . GHSAgithub.com
    security
  9. CVE-2025-46734 . NVDnvd.nist.gov
    security
  10. commonmark . Snyk vulnerability databasesecurity.snyk.io
    security