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Principle vs XHTMLized

Professional comparison and analysis to help you choose the right software solution for your needs.

Principle icon
Principle
XHTMLized icon
XHTMLized

Principle vs XHTMLized: The Verdict

⚡ Summary:

Principle: Principle is an open-source visual tool for building interactive UIs. It allows designers and developers to design, prototype, animate and develop user interfaces without writing code. Principle focuses on animations and interactions.

XHTMLized: XHTMLized is a free browser plugin that converts web pages into valid XHTML code. It cleans up messy HTML code, fixes errors, and adds missing tags to ensure web pages meet XHTML standards for improved accessibility and search engine optimization.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature Principle XHTMLized
Sugggest Score — —
Category Design & Graphics Web Browsers
Pricing Open Source Open Source

Product Overview

Principle
Principle

Description: Principle is an open-source visual tool for building interactive UIs. It allows designers and developers to design, prototype, animate and develop user interfaces without writing code. Principle focuses on animations and interactions.

Type: software

Pricing: Open Source

XHTMLized
XHTMLized

Description: XHTMLized is a free browser plugin that converts web pages into valid XHTML code. It cleans up messy HTML code, fixes errors, and adds missing tags to ensure web pages meet XHTML standards for improved accessibility and search engine optimization.

Type: software

Pricing: Open Source

Key Features Comparison

Principle
Principle Features
  • Intuitive drag-and-drop interface for designing UI elements
  • Powerful animation tools for creating smooth transitions and interactions
  • Support for importing Sketch, Photoshop, and Figma files
  • Ability to create and test prototypes directly within the application
  • Real-time preview of design changes
  • Export designs as HTML, CSS, or Swift code
XHTMLized
XHTMLized Features
  • Converts HTML to valid XHTML
  • Cleans up messy HTML code
  • Fixes HTML errors
  • Adds missing tags
  • Ensures web pages meet XHTML standards
  • Improves accessibility
  • Improves SEO

Pros & Cons Analysis

Principle
Principle

Pros

  • Streamlines the design and prototyping process for user interfaces
  • Provides a visual, code-free approach to building interactive UIs
  • Integrates well with other design tools like Sketch and Figma
  • Offers a robust set of animation and interaction capabilities
  • Allows for rapid iteration and testing of design ideas

Cons

  • Limited support for certain design features and interactions
  • Steeper learning curve compared to some other prototyping tools
  • Occasional performance issues or stability problems
  • Limited export options for certain platforms or frameworks
XHTMLized
XHTMLized

Pros

  • Free browser plugin
  • Easy to install and use
  • Makes web pages XHTML compliant
  • Improves code quality
  • Increases accessibility
  • Boosts SEO

Cons

  • Only available as browser plugin, not standalone app
  • Limited to fixing XHTML issues, no other features
  • Requires browser restart to take effect
  • Not compatible with all browsers

Pricing Comparison

Principle
Principle
  • Open Source
XHTMLized
XHTMLized
  • Open Source

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Learn More About Each Product

Principle
Principle
Reviews, pricing & alternatives →
XHTMLized
XHTMLized
Reviews, pricing & alternatives →

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