Validate Terraform Online — HCL Syntax Checker
Live HCL syntax validation with line numbers. Syntax only — not terraform validate or provider checks.
Developer notes
• Validates HCL grammar only — not resource types, variables references or state. • Debounced ~300 ms after typing stops. • Empty input shows idle state (not “invalid”). • Use format-terraform after fixing syntax errors.
When teams pick this route
• Sanity-check a pasted module fragment in a ticket or chat. • Find the exact line of a brace typo without opening the IDE. • Validate .tfvars-style HCL snippets that are not full modules. • Teach HCL structure with immediate feedback.
Worked examples
Valid provider + resource skeleton
Input
Validation result
Unclosed block (common copy-paste mistake)
Input
Validation result
Navigate related DevOps tools
Format fixed HCL with format Terraform, or explore minify Terraform and the DevOps hub.
HCL validator FAQ
Syntax only
Same as terraform validate?
No — this checks HCL grammar only. Provider schemas and graph validation require the Terraform CLI.
Does it check .tfvars files?
Yes, if the content is valid HCL syntax. It does not evaluate variable values against modules.
Why debounced validation?
To avoid parsing on every keystroke while keeping feedback under ~500 ms after you pause typing.
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