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Testing Content Cards

It is extremely important to always test your Content Cards before sending your campaigns. Our preview and testing capabilities offer two ways to take a look at your Content Cards. You can preview your message to help you visualize as you compose it, as well as send a test message to yourself or a specific user’s device. We recommend you take advantage of both.


You can preview your card as you compose it. This should help you visualize what your final message will look like from your user’s perspective.

In the Preview tab of your composer, the view of your message might not be identical to its actual rendering on the user’s device. We recommend always sending a test message to a device to ensure that your media, copy, personalization, and custom attributes generate correctly.


To send a test to either content test groups or individual users, push must be enabled on your test devices with valid push tokens registered for the test user before sending. For iOS users, you must tap the push notification sent by Braze in order to view the test Content Card. This behavior only applies to test Content Cards.

Preview message as user

You can also preview messages from the Test tab as if you were a user. You can select a specific user, a random user, or create a custom user.


Test checklist

  • Do the images and media show up and act as expected?
  • Does the Liquid function as expected? Have you accounted for a default attribute value in the event that the Liquid returns no information?
  • Is your copy clear, concise, and correct?
  • Do your links direct the user to where they should go?


After your Content Cards are sent, you can break down or debug any issues from the Event User Log in the Developer Console.

A common use case is trying to debug why a user can’t see a particular Content Card. To do so, you can look in the Event User Logs for the Content Cards delivered to the SDK on session start, but prior to an impression, and trace those back to a specific campaign:

  1. Go to Settings > Event User Log.
  1. Locate and expand the SDK Request for your test user.
  2. Click Raw Data.
  3. Find the id for your session. The following shows an example excerpt:

         "session_id": "D1B051E6-469B-47E2-B830-5A728D1D4AC5",
         "data": {
           "ids": [
         "name": "cci",
         "time": 1636106490.155
  4. Use a decoding tool like Base64 Decode and Encode to decode the id from Base64 format and find the associated campaign_id. In our example, this results in the following:


    Where 6185005a9d9bee79387cce43 is the campaign_id.

  5. Go to the Campaigns page and search for the campaign_id.

Search for campaign_id on Campaigns page

From there, you can review your message settings and content to drill down and determine why a user can’t see a particular Content Card.

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