What TerraVisual is

TerraVisual is a free Terraform visualizer for people learning Infrastructure as Code. You write HCL, or import an existing project, and the infrastructure it describes is drawn as a diagram that redraws as the code changes. Resources appear inside the containers they belong to (provider, region, network, subnet), so you can see what a configuration builds before you ever run terraform plan.

It is made for students, engineers picking up Terraform for the first time, and anyone reviewing a configuration who would rather see its shape than read it line by line. Click a box in the diagram to jump to the code that declares it, or move the cursor in the code and the diagram selects what you are editing. An outline lists the same infrastructure as a tree you can navigate with the keyboard or a screen reader.

How it works

1. Write or paste Terraform

   Type into the editor, start from one of the examples, or import a folder of .tf and .tfvars files. Nothing to install, no account to create.

2. Watch the diagram update

   Every change is analyzed as you type, with HashiCorp's own HCL parser. Variables, locals, functions, conditionals, count, for_each and local modules are evaluated.

3. Share or save it

   Copy a link that carries the whole workspace inside the URL, or save the diagram as a PNG. Your work is also kept in this browser between visits.

What it draws

AWS, Azure and Google Cloud are covered at comparable depth, through a catalog that knows which resources live inside which:

• Networks: AWS VPCs and subnets, Azure resource groups and virtual networks, Google Cloud VPC networks and subnetworks, with their gateways, routers and addresses.
• Compute and containers: EC2 instances, ECS clusters and services, Azure virtual machines and AKS, Compute Engine instances and GKE.
• Storage and databases: S3 buckets, RDS instances, Azure storage accounts and PostgreSQL servers, Cloud Storage buckets and Cloud SQL.
• Serverless, security and identity: Lambda, Azure Functions and Cloud Functions; security groups and firewalls; IAM roles, managed identities and service accounts; load balancers and logging.

A resource type the catalog does not know is still drawn, marked as uncatalogued, so a real project never looks empty and never looks more complete than it is.

Your code stays in your browser

The analyzer is written in Go and compiled to WebAssembly, so parsing, evaluation and drawing all happen on this page. There is no backend, database or account, and the page's Content Security Policy only lets it talk to its own origin. Real Terraform, with its bucket names, internal CIDR ranges and account identifiers, is safe to open here.

Questions

Is my code uploaded anywhere?

No. It is analyzed in your browser and stored only in your browser. A share link does contain your code, compressed into the part of the URL that browsers never send to a server, so anyone holding the link can read it.

Which Terraform features are supported?

Resources, variables and .tfvars files, locals, outputs, conditionals, count, for_each, local modules and over 80 built-in functions. Remote modules, data sources that need a provider, and terraform plan output are not. A value that cannot be known without cloud credentials is shown as unknown, with the reason, never guessed.

Is it free?

Yes. TerraVisual is free to use and open source under the Apache 2.0 license.