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Updated: May 31, 2026

Heading Levels

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Conclusion

Heading Levels — free browser-based HTML practice

■ What this exercise teaches Pick a theme and create h1, h2, and h3 headings in hierarchical order (e.g., My Page, About Me, Hobbies).

Why it matters in real projects

Use headings as a hierarchy. A page should normally have only one h1. Similar patterns appear daily in code review and production UI work.

Step-by-step workflow

1. Read the guide and understand the goal of "Heading Levels" 2. Review the HTML editor pane and start from the starter code 3. Open hints if stuck; compare your diff with the sample solution 4. Click Run and inspect preview/console output 5. Auto-check looks for output containing: <h1>, <h2>, <h3>. 6. After success, continue with adjacent exercises in the same category

Core concept explained

Use headings as a hierarchy. A page should normally have only one h1.

Technical focus

Key HTML elements in this task: h1, h2, h3.

Hint before you peek at the solution

h1 is the largest, then h2, then h3.

Sample solution walkthrough

The solution uses HTML tags such as h1, h2, h3. Check nesting and closing tags. Explanation: Use headings as a hierarchy. A page should normally have only one h1. Hint recap: h1 is the largest, then h2, then h3.

Solution code

📝 Sample code
<h1>My Page</h1>
<h2>About Me</h2>
<h3>Hobbies</h3>

Common mistakes for this exact task

- Skipping the hint: h1 is the largest, then h2, then h3.

Troubleshooting

Q: Preview does not change after Run A: Ensure you edited the HTML pane and clicked Run. Q: Looks correct but check fails A: Auto-check looks for output containing: <h1>, <h2>, <h3>. Look for typos, full-width spaces, or unclosed tags. Q: Console shows errors A: Open DevTools Console and fix bracket/quote mismatches at the reported line. Q: Hard to type on mobile A: Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Interview / portfolio tips

- Explain the techniques in "Heading Levels" in your own words within 30 seconds - Practice walking through each line of the sample solution on a whiteboard - Be ready to discuss tags: h1, h2, h3 - Mention responsive or accessibility trade-offs - Prepare one alternative approach and why you chose this one

What to do after you pass

Move to the next exercise in the html-basic track, then continue the learning roadmap at /en/learning/html-basic/.

Keywords

Free hands-on exercise covering Heading hierarchy, html-basic, beginner, h1, h2, h3, heading levels—search-friendly guide for Heading Levels.

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■ Exercise task

Pick a theme and create h1, h2, and h3 headings in hierarchical order (e.g., My Page, About Me, Hobbies).

Hint if stuck

h1 is the largest, then h2, then h3.

15pt

Heading hierarchy

Pick a theme and create h1, h2, and h3 headings in hierarchical order (e.g., My Page, About Me, Hobbies).

Click error to highlight line. ✕=error ⚠=warning ›=log.

Roadmap · All guides

Deep dive

"Heading Levels" is a beginner-level HTML exercise. Pick a theme and create h1, h2, and h3 headings in hierarchical order (e.g., My Page, About Me, Hobbies). Run it in-browser with automatic checking.

Use headings as a hierarchy. A page should normally have only one h1. Similar patterns appear daily in code review and production UI work.

Pair this with the html-basic roadmap. Exercise #6 reinforces core html-basic skills.

Step-by-step workflow

  1. Read the guide and understand the goal of "Heading Levels"
  2. Review the HTML editor pane and start from the starter code
  3. Open hints if stuck; compare your diff with the sample solution
  4. Click Run and inspect preview/console output
  5. Auto-check looks for output containing: <h1>, <h2>, <h3>.
  6. After success, continue with adjacent exercises in the same category

How to read the sample solution

The solution uses HTML tags such as h1, h2, h3. Check nesting and closing tags. Explanation: Use headings as a hierarchy. A page should normally have only one h1. Hint recap: h1 is the largest, then h2, then h3.

Real-world & career relevance

HTML underpins blogs, e-commerce copy, and corporate sites. Heading hierarchy and semantic markup indirectly support SEO.

Common mistakes

  • Skipping the hint: h1 is the largest, then h2, then h3.
  • Multiple h1 on one page
  • Forgetting closing tags like </p>
  • Non-li children directly under ul
  • Omitting img alt text

Troubleshooting

Preview does not change after Run
Ensure you edited the HTML pane and clicked Run.
Looks correct but check fails
Auto-check looks for output containing: <h1>, <h2>, <h3>. Look for typos, full-width spaces, or unclosed tags.
Console shows errors
Open DevTools Console and fix bracket/quote mismatches at the reported line.
Hard to type on mobile
Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Interview & portfolio tips

  • Explain the techniques in "Heading Levels" in your own words within 30 seconds
  • Practice walking through each line of the sample solution on a whiteboard
  • Be ready to discuss tags: h1, h2, h3
  • Mention responsive or accessibility trade-offs
  • Prepare one alternative approach and why you chose this one

Glossary

h1
Top-level heading—one per page recommended.
p
Paragraph element.
a
Anchor with href for links.

Keywords covered on this page

Free hands-on exercise covering Heading hierarchy, html-basic, beginner, h1, h2, h3, heading levels—search-friendly guide for Heading Levels.

Related dev tools

Learning roadmap

Learning roadmap →

Related exercises

Frequently asked questions

Is "Heading hierarchy" free?

This exercise is free and runs entirely in your browser. No account or credit card required.

Difficulty and time?

"Heading hierarchy" is level "beginner". Read the guide first; beginners can usually finish within 30 minutes. Allow 5–15 minutes per exercise. Use hints, then the solution if stuck.

What after a correct answer?

After a correct answer, use "Next exercise". When you finish a category, continue on the <a href="/en/learning/html-basic/">learning roadmap</a>.

Works on mobile?

Works on mobile browsers, but typing code is easier on a desktop.

Where are other exercises?

All exercises: <a href="/en/learn/">/en/learn/</a> with category filters.

Key takeaway for "Heading hierarchy"?

Use headings as a hierarchy. A page should normally have only one h1. Hint: h1 is the largest, then h2, then h3.

Where does HTML Basics fit?

HTML underpins blogs, e-commerce copy, and corporate sites. Heading hierarchy and semantic markup indirectly support SEO.

Step-by-step for "Heading Levels"?

1. Read the guide and understand the goal of "Heading Levels"<br />2. Review the HTML editor pane and start from the starter code<br />3. Open hints if stuck; compare your diff with the sample solution<br />4. Click Run and inspect preview/console output<br />5. Auto-check looks for output containing: <h1>, <h2>, <h3>.<br />6. After success, continue with adjacent exercises in the same category

How to read the sample solution?

The solution uses HTML tags such as h1, h2, h3. Check nesting and closing tags.<br /><br />Explanation: Use headings as a hierarchy. A page should normally have only one h1.<br /><br />Hint recap: h1 is the largest, then h2, then h3.

Something is not working?

<strong>Preview does not change after Run</strong> → Ensure you edited the HTML pane and clicked Run.<br /><strong>Looks correct but check fails</strong> → Auto-check looks for output containing: <h1>, <h2>, <h3>. Look for typos, full-width spaces, or unclosed tags.<br /><strong>Console shows errors</strong> → Open DevTools Console and fix bracket/quote mismatches at the reported line.<br /><strong>Hard to type on mobile</strong> → Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Career / interview angle?

Explain the techniques in "Heading Levels" in your own words within 30 seconds Practice walking through each line of the sample solution on a whiteboard Be ready to discuss tags: h1, h2, h3 Mention responsive or accessibility trade-offs Prepare one alternative approach and why you chose this one

Related dev tools?

<a href="/en/tools/html-escape/">HTML Escape</a>, <a href="/en/tools/ogp-preview/">OGP Preview</a>

Prerequisites?

Read the <a href="/en/learning/html-basic/">Learning roadmap</a> chapter first.

Can I change the starter code?

Yes—if it works. Understanding the starter first, then adding minimal diffs, speeds up learning.

What do the points mean?

15pt is a difficulty hint, not a score you must maximize.