---
title: Working with Attachment Types
slug: neurons-for-itsm/admin-user-help/enu/latest/working-with-attachment-types
createdAt: 2026-07-14T19:16:43.758Z
---

You can view the allowed attachment file types, add new file type, and delete existing file type from the allowed list. For information on limiting attachment sizes, refer to [Limiting Attachment Size](docId\:IJSQg6kVcPxHUFWA05hB7).

### Default Attachment Types

The default attachment types are:

| `.avi`   | `.bmp`  | `.cer`  | `.csv`  |
| -------- | ------- | ------- | ------- |
| `.doc`   | `.docx` | `.eml`  | `.flv`  |
| `.gif`   | `.html` | `.jpg`  | `.mht`  |
| `.mhtml` | `.msg`  | `.pdf`  | `.pfx`  |
| `.png`   | `.pps`  | `.ppt`  | `.pptx` |
| `.rar`   | `.rtf`  | `.tif.` | `.txt`  |
| `.wmv`   | `.xls`  | `.xlsx` | `.xml`  |
| `.xps`   | `.zip`  |         |         |

Only administrators can add and delete attachment file types.

:::hint{type="info"}
To use **.svg** files, you should first add **\*.svg** to the list of **Allowed File Extensions**. By default, **.svg** is not included in the out-of-the-box (OOTB) list. If it is not added, the application will display an error when you attempt to upload the file.
:::

## Adding an Attachment File Type

Follow these steps to create an attachment type that is not listed.

1. From the Configuration console, click **Configure** > **Security Controls** > **Allowed File Extensions**. The application lists the file extensions that are allowed.
2. Click **Add New**. The **Add File Mask** dialog box is displayed.
3. Enter the file type in the **File Mask** field in the format \*.\<extension type>. For example, `*.exe` or `*.jpg`.
4. Click **Save**.  The new file type is added to the list.

## Deleting an Attachment File Type

1. From the Configuration console, click **Configure** > **Security Controls** > **Allowed File Extensions**. The application lists the file extensions that are allowed.
2. Click the **delete** icon :inlineImage[]{src="https://api.archbee.com/api/optimize/parib0MC3hVoUNdfQdnac/36wp44StYgWRScATebSZs_deleteredx.png" alt caption size="10" width="14" height="13"} next to the file type to remove.
3. Click **Yes** to confirm the deletion. The deleted file type is removed from the list.

:::hint{type="info"}
Deleting a file type from the list does not remove attached files from the database.
:::