Upload assets to use in your app

You can open the Assets panel from the left menu bar in the Builder. Here you're able to upload your own images to use in your app project. Any .png, .jpg, .jpeg, or .gif file can be uploaded. The size of the file should not exceed 5 Mb.



How to prepare images for upload

  • Optimize your images to decrease loading time and increase your app's performance. There are a variety of tools around the web like and imageoptim that can help with this. Or you can use an image hosting service, like Cloudinary, that lets you serve optimized and edited images on demand.
  • Make sure the file name doesn't include special characters like: ,, ;, ", ', &, $, ^. etc. Feel free to use hyphens and underscores.
  • Make sure the file name starts with a letter
  • Avoid using long, alphanumeric file names. Instead, it's best to make the image file name descriptive.

Generating images using OpenAI's DALL·E

You can generate images using AI from within the Assets panel. To generate an image, click the Generate Image button in the top bar of the Assets panel.

Here you can select a model and image size then type in your prompt. Once you click Generate we'll send your request to OpenAI. When the image is returned, you can choose to save it to your project assets by giving it a name and clicking Save to Assets.

ModelDescriptionImage Sizes
DALL·E 2The previous DALL·E model released in Nov 2022. The 2nd iteration of DALL·E with more realistic, accurate, and 4x greater resolution images than the original model.1024×1024
DALL·E 3The latest DALL·E model released in Nov 2023. DALL·E 3 understands significantly more nuance and detail than the previous systems, allowing you to easily translate your ideas into exceptionally accurate images.1024x1024


Images with larger dimensions cost more to generate. Also, DALL·E 3 costs more than DALL·E 2. Keep this in mind when you are using your own OpenAI API key. See OpenAI pricing here.