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Updated: May 31, 2026

First Html

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Conclusion

First Html — free browser-based HTML practice

■ What this exercise teaches Write HTML that displays "Hello World". Use the h1 tag you just learned.

Why it matters in real projects

The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page. Similar patterns appear daily in code review and production UI work.

Step-by-step workflow

1. Read the guide and understand the goal of "First Html" 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: Hello World, hello world, helo world. 6. After success, continue with adjacent exercises in the same category

Core concept explained

The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page.

Technical focus

Key HTML elements in this task: h1.

Hint before you peek at the solution

Use the h1 tag. Wrap the text in <h1> and </h1>.

Sample solution walkthrough

The solution uses HTML tags such as h1. Check nesting and closing tags. Explanation: The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page. Hint recap: Use the h1 tag. Wrap the text in and .

Solution code

📝 Sample code
<h1>Hello World</h1>

Common mistakes for this exact task

- Skipping the hint: Use the h1 tag. Wrap the text in <h1> and </h1>.

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: Hello World, hello world, helo world. 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 "First Html" 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 - 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 environment track, then continue the learning roadmap at /en/learning/environment/.

Keywords

Free hands-on exercise covering Your first HTML, environment, beginner, h1, first html—search-friendly guide for First Html.

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■ Exercise task

Write HTML that displays "Hello World". Use the h1 tag you just learned.

Hint if stuck

Use the h1 tag. Wrap the text in <h1> and </h1>.

10pt

Your first HTML

Write HTML that displays "Hello World". Use the h1 tag you just learned.

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

Roadmap · All guides

Deep dive

"First Html" is a beginner-level HTML exercise. Write HTML that displays "Hello World". Use the h1 tag you just learned. Run it in-browser with automatic checking.

The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page. Similar patterns appear daily in code review and production UI work.

Pair this with the environment roadmap. Exercise #1 reinforces core environment skills.

Step-by-step workflow

  1. Read the guide and understand the goal of "First Html"
  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: Hello World, hello world, helo world.
  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. Check nesting and closing tags. Explanation: The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page. Hint recap: Use the h1 tag. Wrap the text in and .

Real-world & career relevance

Junior web and frontend training often starts with seeing HTML render in a browser. This exercise matches that first step—foundation for portfolios and landing pages.

Common mistakes

  • Skipping the hint: Use the h1 tag. Wrap the text in <h1> and </h1>.
  • Using full-width < > so HTML fails
  • Checking preview without clicking Run
  • Confusing in-browser practice with local file setup

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: Hello World, hello world, helo world. 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 "First Html" 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
  • Mention responsive or accessibility trade-offs
  • Prepare one alternative approach and why you chose this one

Glossary

HTML
HyperText Markup Language—structures web pages.
Browser
Software like Chrome that renders HTML.
Preview
Live view of your code output.

Keywords covered on this page

Free hands-on exercise covering Your first HTML, environment, beginner, h1, first html—search-friendly guide for First Html.

Related dev tools

Learning roadmap

Learning roadmap →

Related exercises

Frequently asked questions

Is "Your first HTML" free?

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

Difficulty and time?

"Your first HTML" 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/environment/">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 "Your first HTML"?

The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page. Hint: Use the h1 tag. Wrap the text in and .

Where does Setup fit?

Junior web and frontend training often starts with seeing HTML render in a browser. This exercise matches that first step—foundation for portfolios and landing pages.

Step-by-step for "First Html"?

1. Read the guide and understand the goal of "First Html"<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: Hello World, hello world, helo world.<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. Check nesting and closing tags.<br /><br />Explanation: The core idea of HTML is wrapping elements in opening and closing tags. h1 represents the largest heading on a page.<br /><br />Hint recap: Use the h1 tag. Wrap the text in and .

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: Hello World, hello world, helo world. 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 "First Html" 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 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>

Prerequisites?

Read the <a href="/en/learning/environment/">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?

10pt is a difficulty hint, not a score you must maximize.