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ExploreUnderStrap

UnderStrap

Build custom WordPress themes with Bootstrap & Underscores.

Free, open-source WordPress theme framework combining Underscores backend with Bootstrap frontend. Trusted by 100,000+ developers for handcrafted sites.

Visit UnderStrap
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UnderStrap

Build custom WordPress themes with Bootstrap & Underscores.

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For developers building custom WordPress themes, Understrap is a free, open-source framework that merges the backend best practices of Underscores with the responsive frontend of Bootstrap. It is used by over 100,000 sites for its clean, flexible, and performant codebase.

  • Combines Underscores and Bootstrap: Get the lightweight, minimalist starter theme from Automattic on the backend and Bootstrap 4's grid, components, and utilities on the frontend for rapid mobile-first development.
  • Child theme ready: The included child theme structure lets you customize and extend functionality without modifying the parent theme, ensuring easy updates.
  • Lightweight and fast: Understrap is built for performance with no bloat, resulting in fast page loads that benefit SEO and user experience.
  • Professional open-source support: Maintained by Howard Development & Consulting with a dedicated team, offering the stability of a backed project along with open-source flexibility.
  • Easy customization: Well-organized, commented code makes it simple to add custom templates, sections, and styling to match any design.

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Free, open-source WordPress theme framework combining Underscores backend with Bootstrap frontend. Trusted by 100,000+ developers for handcrafted sites.

  • UnderStrap
  • v0.9.4
  • 5 days ago
  • Apr 25, 2026
  • Access: Silver
  • Holger Koenemann
  • Theme
  • 0
  • No comments