Internet Toolset

Comprehensive Tools for Webmasters, Developers & Site Optimization

HTML Formatter & Validator

HTML Formatter & Validator


Help & Examples

Use the options above to format your HTML and perform advanced analysis. Below are before→after examples of the core formatter plus each feature:

Core Formatter

Input HTML:

<div class="wrapper"><p>Hello</p><img src="img.jpg"/></div>

Formatted Output:

<div class="wrapper">
  <p>
    Hello
  </p>
  <img src="img.jpg"/>
</div>
1. Validation Report

Input:

<div class="wrapper"><p>Hello</p><img src="img.jpg"></div>

Output:

Total tags: 3
Unique tags: {'div': 1, 'p': 1, 'img': 1}
Images missing alt: 1
Internal links: 0
External links: 0
2. Extracted Links

Input:

<a href="/home">Home</a>
<a href="https://example.com">Example</a>

Output:

Home → /home
Example → https://example.com
3. Images Listing

Input:

<img src="/logo.png" alt="Logo">
<img src="/banner.jpg">

Output:

src: /logo.png, alt: "Logo"
src: /banner.jpg, alt: ""

Tip: Always include meaningful alt text for accessibility.

4. Headings Outline

Input:

<h1>Main</h1>
<h2>Sub</h2>
<h3>Section</h3>

Output:

1. H1: Main
2. H2: Sub
3. H3: Section

Why it matters: Proper heading structure boosts SEO and readability.

5. IDs & Classes Used

Input:

<div id="main" class="container highlight">…</div>

Output:

IDs: main
Classes: container, highlight

Pro Tip: Use this audit to clean up unused selectors in your CSS.

Why These Insights Matter
  • Readability: Clean, indented HTML is easier to scan and debug.
  • Accessibility: Catch missing alt tags and enforce semantic structure.
  • SEO: Maintain clear heading hierarchies and healthy link ratios.
  • Maintainability: Identify CSS hook points (IDs & classes) for refactoring.
  • Collaboration: Share a standardized codebase that everyone can understand.

Integrate this tool into your workflow to catch errors early, enforce best practices, and keep your HTML clean, accessible, and optimized.