YAML Formatter
Format, validate, and beautify YAML with customizable options
Load Example Data:
Input YAML
Formatted YAML
Related YAML Tools
Professional YAML Formatting Features
Customizable Formatting
Configure indentation size, sort keys alphabetically, and control output formatting options.
Real-time Validation
Instant syntax validation with detailed error messages and line-by-line feedback.
File Support
Upload YAML files directly, process large files up to 100MB, and download formatted results.
Visual Enhancements
Optional line numbers, syntax highlighting, and clear visual indicators for validation status.
Privacy Focused
All processing happens locally in your browser. No data is sent to external servers.
Export Options
Copy formatted YAML to clipboard or download as file with preserved formatting.
Perfect for Every Development Workflow
DevOps & Infrastructure
- Format Kubernetes deployment manifests
- Clean up Docker Compose configurations
- Standardize Helm chart values
- Organize Ansible playbooks
CI/CD & Configuration
- Format GitHub Actions workflows
- Clean GitLab CI pipeline files
- Organize application configuration files
- Standardize environment settings
YAML Formatting Best Practices
Indentation & Structure
Consistent Indentation
Use 2 spaces for most configurations, 4 spaces for complex nested structures
Logical Grouping
Group related configuration sections together for better readability
Key Ordering
Sort keys alphabetically for consistency across team environments
Quality & Standards
Validation First
Always validate YAML syntax before formatting to catch errors early
Team Standards
Establish formatting conventions for consistent code style across projects
Version Control
Format YAML files before committing to maintain clean diff history
Frequently Asked Questions
What indentation should I use for YAML files?
2 spaces is the most common and recommended indentation for YAML files. It provides good readability while keeping files compact. Use 4 spaces for complex nested structures if your team prefers it.
Should I sort keys alphabetically in YAML?
Alphabetical sorting can improve consistency and make it easier to find specific keys in large files. However, for some configurations like Docker Compose, the order may be semantically important.
How large YAML files can I format?
Our formatter supports files up to 100MB in size. All processing happens locally in your browser, so larger files may take more time depending on your device's performance.
Does formatting change the YAML structure?
No, formatting only changes whitespace, indentation, and optionally key order. The semantic meaning and data structure of your YAML remains exactly the same.
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