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How to Use JSON or YAML Data in terraform.tfvars-Style HCL
Teams often keep values in JSON or YAML first, then need to move those same values into Terraform-style HCL assignments. That is where JSON to HCL and YAML to HCL tools become useful.
Published March 22, 2026 · Updated March 22, 2026
Why This Workflow Happens
Configuration values often start in JSON or YAML because they were exported from another system, copied from an API response, or kept in a broader configuration workflow. Terraform users then need the same values in a format that looks more natural inside terraform.tfvars-style HCL.
This is a practical format-translation problem rather than a change in the underlying data.
When JSON To HCL Helps
JSON to HCL is useful when your values already exist as a JSON object and you want readable HashiCorp-style assignments. This is especially handy for variable files, examples, demos, and cleanup work.
The goal is usually not to generate every kind of Terraform block, but to turn data values into a format that feels natural for Terraform variable workflows.
When YAML To HCL Helps
YAML to HCL is useful for the same reason when your values live in YAML instead. This often happens in teams that already use YAML heavily in deployment, config, or infrastructure-adjacent workflows.
Converting those values into HCL assignments can make them easier to reuse in Terraform-oriented tooling without rewriting everything by hand.