Amazon Ad Server will be sunset in Q4 2024, please visit this page (AAS offboarding information) for offboarding support resources and sunset FAQs. Details shared on that page represent the most up to date information in the Help Center, if you find disparate information in other resources please default to the information in the AAS offboarding information page accordingly.

  • Creative > Assets Library > Assets


The assets library is a section in Amazon Ad Server (AAS) in which you can upload the elements of your ads, such as zipped HTML creatives (called workspaces), images, videos, fonts. Your assets library is accessible to all users of your account.

Assets library can be accessed via the sidebar Creative > Asset Library.

It is recommended to keep your assets organized by using folders. You can perform a set of actions on assets including viewing, moving, previewing, and replacing assets. If for any reason you cannot perform an action on the asset, the action is disabled.


Note: If a user is having issues creating or viewing assets, please confirm they have the correct permissions here.

Supported files

The following table lists the supported files and the asset-associated icons.








.jpg, .png, .gif, .bmp, .svg


.mp4, .mov, .avi, .webm, .wmv, .flv


External video


.mp3, .ogg, .wav


.css, .doc, .json, .pdf, .txt, .xlsx, .xml, .eps, .ttf, .woff, .woff2, .otf, .rft


html, js


Important: On Windows, remove the thumbs.db files before creating your archive as these may unnecessarily add up to the total weight of your ad.

On Mac OS, AAS may display an error when trying to upload a .zip file that contains unsupported hidden files created by the OS: .DS_Store files, and _MACOSX folders. To fix this, you have to make sure hidden files are displayed in the Finder, and delete these unnecessary files before creating a clean .zip archive.

Setting up master ads

Setting up a single ad

When configuring a new ad from the Ad List, our build guides indicate to assign a workspace folder. By doing so, you will in fact navigate in the assets library. This can be used as a shortcut to directly upload your assets while configuring your ad at the same time.


To access to the build guides for each ad format, see Amazon Ad Server ad formats

Setting up multiple master ads

When bulk creating Ads via the Ad Creation Wizard, you can upload or select your workspaces in the assets library.


Important: Make sure to select the right folder before starting to upload.


1. Select the folder where you want to upload the asset.

2. Drag and drop your local asset or browser your files.

For more information, see Set up multiple ads using Ad Creation Wizard

Details of the interface

At the top of the interface you will find a button navigation, three of this buttons are regarding manage the assets library:

  1. Upload: When you click Upload, the Upload Assets dialog box opens. You will be able to drag and drop your files or browse them to select one by one. 1 GB is the maximum allowable file size when uploading creative assets.

  2. Add External Assets: An external asset is an video asset fetched by AAS from an external source (URL) provided by the user. AAS downloads the video asset from external source and keeps a copy, and creates the library asset from that copy. Once the copy is created in the assets library, the user is able to use it in the ads he is handling. External Asset display a different icon with a small cloud next to it (see image below).


    External assets are mandatory for VAST DCO. For more information, see In-stream VAST dynamic creative ads

    Rules and guidelines:

    • External Assets option is exclusive for video files.

    • External assets are not synced with the external source. In order to update an external asset in AAS, it needs to be deleted and recreated using the same external source URL that you have previously updated.

      You can't delete an asset if it is attached to an ad. To delete the asset you need to add a new asset to the linear of the ad, save it and then delete the old asset. You should use the same external source URL that you have previously updated.

    • For security reasons, AAS does not allow downloading of External Assets.

    • It can require some time for AAS to create the External Asset entry depending on the file size.

    • You need to refresh the Asset Library folder to check whether external asset has been successfully created.

    • Autotranscoding is not available for External Assets.

  3. New Folder: Allows you to create a new folder and name it. The folders can be deleted only if are empty.


    Note: If after creating a folder you are redirected to the main folder instead of the new one, please refresh the page and navigate to the new folder before starting to upload your assets.

  4. Edit: Select an asset to get access to the Edit button. This option allows you to access to the details of your selected asset, such as date of creation, file size or dimensions. In this new view, you will also be able to rename, replace, delete and preview the asset.

    For files that contain code (.html, .js and .css), you will also be able to access to an online code editor.For more information, see Edit code embedded in assets using the code editor

  5. Replace: Select an asset to get access to the Replace button. This option allows you to overwrite the asset with a new one, and update the ads using it at the same time. Assets utilized in ads that have the live or published status can only be updated if you have the required permission. Contact your creative support team if you need this permission. Delay may vary for live ads to reflect the change.


    Note: When you create Ads directly in AAS Ad Builder, the uploaded assets are not accessible in the assets library. To edit or replace an asset, you have to edit your ad in AAS Ad Builder directly. Please see Introduction to Ad Builder and Ad Builder Tips and Best Practices for more information.

  6. Move: Select an asset to get access to the Move button. This option allows you to relocate the selected assets or workspaces into another folder.

    Rules and guidelines:

    • Manually created folders can not be moved.

    • Is possible to move independent assets into a workspace (zipped folder).

    • It is not possible to move assets when they are part of a workspace.

  7. Rename: Select an asset to get access to the Rename button. This option allows you to edit the name of the selected element name. You can also rename the asset on the asset detail view by using the Edit button.

  8. Delete: Select an asset to get access to the Delete button. This option allows you to delete assets and empty folders. Assets assigned to an Ad can not be deleted.

    Rules and Guidelines:

    • Only empty folders can be deleted. If you want to delete a folder containing assets, delete the folder's contents, and then proceed to delete the folder.

    • Assets assigned to an ad cannot be deleted.

    • Deleting a workspace while also delete all its contents.

    • You can delete multiple assets in a single operation.

  9. Download: Select an asset to get access to the Download button. This option allows you to download an asset or a workspace to your computer.

    Rules and Guidelines:

    • You can download multiple assets/workspaces simultaneously:

      • If the total size of the assets/workspaces is less than 10 MB, a zip file is immediately downloaded.

      • If the total size of the assets/workspaces exceeds 10 MB, an URL link is sent in an email message. Clicking the URL link downloads the zip file.

    • You cannot download HLS content.

    • You cannot download external assets.

  10. Preview: Select an asset to get access to the Preview button. This option allows you to take a look at the selected asset and some of its properties, such as name, dimensions, size, dates of creation and update etc.

    Rules and Guidelines:

    • Code files: The preview will show the source code in a non editable mode. To access to the edit mode, use the Edit button instead.

    • Images: The preview will display the image.

    • Video : The preview will display the video in a native player.

  11. History: Select an asset to get access to the History button. This option allows you to review the past actions done on this element, such date of creation or rename.

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