Hupspot HTML Comment Guide

If you build or edit pages in Hubspot or any modern CMS, understanding how HTML comments work is essential for keeping your code clean, readable, and easy to maintain.

HTML comments let you leave notes for yourself or other developers without displaying anything to visitors. They are also useful for temporarily disabling sections of a page while you test changes.

What Is an HTML Comment in Hubspot Projects?

An HTML comment is a piece of text or code that the browser ignores. It is visible in the source code, but it never appears on the rendered page.

In Hubspot templates or custom modules, comments help explain layout decisions, mark sections of code, and organize complex components.

Basic HTML Comment Syntax for Hubspot Pages

The basic syntax for an HTML comment is:

<!-- This is a comment -->

• <!– starts the comment.
• –> ends the comment.
• Anything between these markers will not be displayed in the browser.

You can place comments on their own line or at the end of a line that contains other HTML.

How to Comment Out HTML Code in Hubspot

To comment out existing HTML, you simply wrap it with the comment markers. This is especially useful while editing Hubspot landing pages, blogs, or website templates.

Step-by-Step: Comment Out a Single Line

1. Locate the line of HTML you want to hide.
2. Place <!-- before the line.
3. Place --> after the line.

Example:

<!-- <p>This paragraph is hidden in Hubspot.</p> -->

The paragraph will not display on the page, but it remains in your template or module for later use.

Step-by-Step: Comment Out Multiple Lines

1. Select the block of HTML you want to hide.
2. Add <!-- at the very beginning of the block.
3. Add --> at the very end.

Example:

<!--
<section class="promo">
  <h2>Promo Title</h2>
  <p>This promo section is temporarily disabled.</p>
</section>
-->

This pattern works the same in Hubspot coded files, custom modules, and any HTML-based template.

HTML Comment Use Cases in Hubspot Templates

Comments are more than just notes. They can organize your code, help teams collaborate, and make updates safer.

Documenting Sections in Hubspot Layouts

When building complex layouts, descriptive comments show where each section starts and ends.

<!-- Header: Main navigation and logo -->
<header>...</header>

<!-- Hero section: Primary CTA -->
<section class="hero">...</section>

This is especially helpful when multiple people edit Hubspot templates over time.

Temporarily Disabling Content in Hubspot

Instead of deleting content, comment it out. That way you can restore it quickly if needed.

<!--
<div class="old-offer">
  <p>Legacy offer no longer in use.</p>
</div>
-->

This technique reduces risk during seasonal campaigns, experiments, and A/B tests.

Leaving Notes for Other Hubspot Editors

Comments can guide marketers or developers who work on the same portal. For example:

<!--
Do not remove this section.
It is required for the pricing calculator integration.
-->

Clear notes like this prevent accidental changes that might break important functionality.

Best Practices for HTML Comments in Hubspot

Using comments wisely improves readability and performance without cluttering your code.

Keep Comments Clear and Specific

Write comments that explain why something exists, not just what it is.

• Bad: <!-- Button -->
• Better: <!-- Primary CTA button used in all Hubspot landing pages -->

Good comments help future editors understand design decisions and integration details.

Avoid Over-Commenting in Hubspot Code

Too many comments can be distracting. Use them where they add genuine value:

• At the start and end of major sections.
• To describe non-obvious logic.
• To warn about dependencies or critical code.

Routine, self-explanatory HTML usually does not need heavy annotation.

Do Not Nest HTML Comment Tags

HTML comments do not support true nesting. If you try to comment out a block that already contains a comment, the browser may interpret it incorrectly.

Instead, remove or adjust inner comments before wrapping a larger section, especially within Hubspot modules that generate dynamic markup.

Common Mistakes When Commenting in Hubspot

Even simple syntax can cause issues if applied carelessly. Here are errors to avoid.

Forgetting to Close the Comment

Leaving off the --> end marker will cause the browser to treat everything after the opening tag as a comment.

<!-- Unclosed comment
<p>This will never appear.</p>

Always double-check that each comment has both an opening and closing tag, especially in larger Hubspot templates.

Placing Comments Inside HTML Attributes

Do not insert full comment tags inside attributes. For example, this is invalid:

<div class="hero <!-- highlight -->">...

Keep comments outside of attributes and tag names to avoid broken layouts.

Confusing HTML Comments with HubL or Script Comments

In Hubspot, you may also work with HubL, JavaScript, and CSS. Each language has its own comment syntax:

• HubL: {# This is a HubL comment #}
• JavaScript: // single-line or /* multi-line */
• CSS: /* CSS comment */

Use HTML comments only for markup, and the correct syntax for other languages inside your theme or module files.

Learning More About HTML Comments Beyond Hubspot

The core principles of HTML comments are the same across all platforms. For additional examples and explanations you can review the original guide at this HTML comment tutorial, which walks through multiple patterns and scenarios.

If you want expert help optimizing your pages, technical SEO, or content structure, visit Consultevo for strategic support.

Conclusion: Use HTML Comments Wisely in Hubspot

HTML comments are a simple but powerful tool for anyone editing web content. In Hubspot environments, they help organize sections, coordinate teams, and safely test changes without losing code.

By following clean syntax, avoiding nesting issues, and writing clear, purposeful notes, you can keep every Hubspot page easier to manage, troubleshoot, and scale over time.