Compare Terraform Configurations — Infrastructure Diff Viewer

Terraform manages real infrastructure — servers, databases, load balancers, DNS records, and security groups. A wrong change in a Terraform configuration can delete a production database, expose ports to the internet, or decommission critical services. Reviewing Terraform diffs carefully is not optional.

This diff viewer lets you compare two Terraform configuration files (HCL) with proper syntax highlighting. See which resources are being added, modified, or removed before you run `terraform apply`.

Terraform's built-in `terraform plan` command shows you what will change, but it presents the output as a text plan that can be hundreds of lines long. Comparing the actual HCL configuration files in a syntax-highlighted diff viewer gives you a different and complementary perspective — you see the intent of the change, not just the effect.

This is particularly useful for reviewing pull requests that modify Terraform configurations. The code reviewer can see exactly which resource blocks changed, which variables were updated, and which modules were added or removed. Combined with the plan output, this gives a complete picture of the infrastructure change.

For organizations with strict change management processes, a config diff also serves as documentation. It clearly shows what was changed, by whom, and can be attached to change tickets or audit trails.