Generating Complex HTML Content in Fozzels: Best Practices

Fozzels can generate not only standard product descriptions, but also more complex content such as FAQ sections, HTML blocks, styled content, and interactive elements.

However, complex HTML generation requires a few additional considerations. If the output is large and contains scripts, styles, and extensive markup, the setup of the flow becomes especially important.

This guide explains how to configure such flows and avoid incomplete or invalid HTML results.

1. Choose a suitable AI model

The more complex and extensive the requested output is, the more capable the AI model should be.

For large HTML-based generations, we do not recommend lightweight models such as Gemini 2.5 Flash Preview. In some cases, the model may reach its output token limit before completing the entire response. This can result in:

• output being cut off in the middle;

• incomplete HTML sections;

• unclosed tags;

• missing parts of the requested content.

For complex HTML generation, we recommend using at least a Pro model. For particularly large and technically complex outputs, Anthropic Opus 4 is our preferred option.

2. Allow all required HTML tags

If your generated content contains <script>, <style>, or other non-standard HTML elements, make sure these tags are included in the list of allowed HTML tags in Fozzels.

If a tag is not allowed, Fozzels may remove it from the generated output. This can affect the structure and functionality of the final content.

Important: Make sure all tags required by your prompt are allowed before starting the generation.

3. Give the model explicit HTML rules

A complex HTML prompt should contain clear instructions about how the structure must be handled.

We recommend explicitly instructing the model to:

• always return a complete HTML structure;

• close every opened tag;

• never leave HTML tags unclosed;

• preserve the required HTML hierarchy;

• not remove or move required HTML elements;

• not stop in the middle of an HTML element or section;

• avoid unnecessary HTML or excessive text;

• keep the output within a reasonable size if there is a risk of reaching the model's output limit.

The more explicit these requirements are, the more reliably the model can maintain the intended structure.

4. Understand how the editor handles incomplete HTML

The Fozzels editor can help correct minor HTML issues.

For example, if the generated result contains a small number of unclosed tags, the editor may be able to close them automatically.

However, the editor cannot reliably reconstruct a heavily damaged HTML structure. If the AI output contains many unclosed or incorrectly structured tags, there may not be enough information for the editor to determine what the intended structure was.

Therefore, the editor should not be treated as a solution for incomplete AI generations. It is designed to help with minor formatting issues, not to reconstruct a large or truncated HTML response.

For complex HTML flows, you can now choose whether the editor should be applied, as the editor is optional.

Important: Editor changes are not reversible

If you open a result in the editor and the structure becomes incorrect:

Do not save the changes.

Close the popup without saving and open the result again. This allows you to return to the original generated result.

5. Validate your results before running a bulk generation

For complex HTML flows, we strongly recommend testing the setup on a very small number of products first.

A good approach is:

1. Generate 1–2 products.

2. Check whether the complete HTML structure is present.

3. Verify that all required tags are closed.

4. Check that scripts and styles are preserved.

5. Review the result with and without the editor if necessary.

6. Only then proceed with a larger generation.

This is especially important when you have changed the AI model, prompt, or HTML settings.

Fozzels also performs additional validation of generated HTML to help identify incomplete tags and invalid structures.

Recommended setup checklist

Before starting a large generation of complex HTML content, make sure:

 You are using a sufficiently capable AI model.
 All required HTML tags are allowed.
 <script> and <style> are allowed if your content requires them.
 The prompt contains explicit HTML structure rules.
 The prompt asks the model to close all tags.
 The requested output is not unnecessarily large.
 You understand that the editor is optional.
 You have tested the flow on 1–2 products first.
 The test results have been reviewed before starting a bulk generation.

In short

Complex HTML generation is possible in Fozzels, but it requires a little more preparation than standard content generation.

The most important things to remember are:

Use a capable model → allow the required HTML tags → give the model strict HTML instructions → test on 1–2 products → review the output before running a bulk generation.

This approach significantly reduces the risk of incomplete, truncated, or invalid HTML results.