> ## Documentation Index
> Fetch the complete documentation index at: https://moengage.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Why Does the Zip Upload Fail When Uploading to an HTML Template?

> Fix ZIP upload failures in MoEngage HTML email templates by checking file size limits, naming rules, supported image formats, and folder paths.

## Problem

Unable to upload the ZIP file to the HTML template in the Email campaign, resulting in the following error message:

Oh snap! Zip upload failed. Please contact our support team.

<img src="https://mintcdn.com/moengage/fVqFKGn_bbcOn3ck/images/moengage_26821b.png?fit=max&auto=format&n=fVqFKGn_bbcOn3ck&q=85&s=3455676ee7aaf9a8989016da6d017fa3" alt="" width="1600" height="874" data-path="images/moengage_26821b.png" />

## Prerequisites

Ensure the ZIP file meets the following requirements during the upload process:

* Ensure that the file size is under 5 MB.
* Use a file name without the \*, /, , &, \~, or " characters.
* Include only one HTML file with inlined CSS.
* Use JPG, JPEG, PNG, or GIF formats for images.
* Ensure the image paths match the ZIP folder structure, including case sensitivity.

## Explanation

* HTML is a markup language where minor code issues do not usually impact rendering on the localhost or server.
* The HTML editor accepts code without errors, so the uploaded code should be error-free.

## Instructions

* Ensure that both opening and closing tags exist because they are essential for proper functionality. For example, the correct code must look as follows:
  <CodeGroup>
    ```html HTML theme={null}
    <div><p> contents  </p></div>
    ```
  </CodeGroup>
* Ensure that all created classes have a corresponding closing tag. For example, the correct code must look as follows:
  <CodeGroup>
    ```text Code theme={null}
    .myclass{
    color:"red"
    }
    .mysecondclass{
    color:"blue"
    }
    ```
  </CodeGroup>

<Info>
  You can perform checks on the utilized CSS.
</Info>