List to String in Terraform

Terraform’s type system is usually your friend — until you need to feed a list into something that expects a single string (a tag value, a template, a user-data snippet, an output, or a provider argument). Converting a list to a string is a common “glue” task, and the right approach depends on the shape of your data and the exact output format you need.

In the full guide, we cover:

• The most common pattern: join() for delimiter-separated strings
• Formatting and shaping lists using expressions (for), format(), and formatlist()
• Handling edge cases like nested lists, null/empty values, and quoting
• Practical examples for outputs, templates, and provider arguments

➡️ Read the full article on our blog:

https://spacelift.io/blog/terraform-list-to-string