Why does YAML fail when using tab characters?
The YAML specification strictly forbids tab characters for indentation. DevHub automatically detects tabs and converts them to spaces.
Formatters
Format and validate common YAML indentation locally.
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YAML Formatter Developer Guide
100% Client-Side & PrivateClean up YAML configuration and catch common indentation mistakes without sending the document to a server.
Key capabilities
- Formats unindented or misaligned YAML documents into standard 2-space indentation
- Validates YAML syntax and catches missing colons, tabs, and indentation mismatches
- Preserves comments and multi-line strings cleanly
- In-browser validation with helpful error location pointers
Common use cases
- Fixing indentation errors in GitHub Actions workflow files and GitLab CI pipelines
- Formatting Kubernetes pod manifests, service definitions, and Helm values
- Reviewing and standardizing Docker Compose and OpenAPI YAML specifications
How to use YAML Formatter
- Paste your YAML configuration into the editor
- Check the formatted output or review reported syntax warnings
- Copy the cleaned, valid YAML to your clipboard