Format, validate, and beautify YAML with customizable options
Format up to 50 YAML files at once and download as a ZIP.
Process up to 50 files at once with Pro. Save hours of repetitive work.
Upgrade to Pro β $8/moProfessional-grade YAML formatting with customizable options
Configure indentation size, sort keys alphabetically, and control output formatting options
Instant syntax validation with detailed error messages and line-by-line feedback
Upload YAML files directly, process large files up to 100MB, and download formatted results
Optional line numbers, syntax highlighting, and clear visual indicators for validation status
All processing happens locally in your browser. No data is sent to external servers
Perfect for Kubernetes manifests, Docker Compose, CI/CD pipelines, and configuration files
Everything you need to know about YAML formatting and best practices
Our YAML formatter provides comprehensive customization options: configurable indentation (2 or 4 spaces), alphabetical key sorting for consistency, line width control for readability, visual line numbers and syntax highlighting, quote handling preferences, and formatting presets for different use cases. You can also control array formatting, object structure, and whitespace handling to match your team's coding standards.
YAML formatting is essential for DevOps and Infrastructure (Kubernetes deployment manifests, Docker Compose configurations, Helm chart values, Ansible playbooks), CI/CD and Configuration (GitHub Actions workflows, GitLab CI pipeline files, application configuration files, environment settings), cloud infrastructure (AWS CloudFormation, Azure Resource Manager templates, Google Cloud Deployment Manager), and development workflows (API documentation, configuration management, data serialization, microservices configuration).
Our real-time validation engine provides instant syntax checking as you type, detecting indentation errors and structural issues, invalid characters and escape sequences, missing or extra brackets and braces, incorrect nesting and hierarchy problems, duplicate keys within objects, and invalid data types or format issues. The validator shows detailed error messages with line numbers and suggestions for quick fixes, helping maintain valid YAML throughout the editing process.
Best practices include using consistent indentation (2 spaces is most common for YAML, 4 spaces for complex nested structures), maintaining logical grouping of related configuration sections, considering alphabetical key sorting for team consistency, validating syntax before formatting to catch errors early, establishing team formatting conventions for consistent code style, and formatting files before committing to maintain clean diff history. Our tool supports all these practices with customizable options.
The formatter supports files up to 100MB with optimized processing for large configurations. All processing happens locally in your browser for maximum privacy and security. For very large files, the tool provides progress indicators and efficient memory management. Performance depends on file complexity and browser capabilities, but typical configuration files (Kubernetes manifests, Docker Compose files) process instantly with real-time feedback.
The tool provides multiple export options: copy formatted YAML to clipboard with one click, download as properly formatted YAML files with preserved formatting, file upload support for batch processing, and integration with development workflows. You can maintain original file names, preserve comments and structure, and use the formatted output directly in your CI/CD pipelines, version control systems, and deployment tools.
No, formatting only changes whitespace, indentation, and optionally key order for consistency. The semantic meaning and data structure of your YAML remains exactly the same. All configuration values, nested structures, arrays, and object relationships are preserved. The formatter ensures that the parsed result is identical to the original, only improving readability and maintaining coding standards.
All YAML processing happens locally in your browser with no data transmission to external servers, ensuring complete privacy for sensitive configuration files, API keys, and infrastructure details. The tool never stores, logs, or transmits your YAML content. This local-only approach makes it safe for processing production configurations, secrets management files, and proprietary infrastructure definitions while maintaining enterprise security standards.