Does the YAML Formatter validate indentation?
Yes. Invalid nesting, inconsistent structure, malformed mappings, and unsupported syntax can be reported before formatting.
Formatter
YAML Formatter
Format and beautify YAML online with consistent indentation and syntax validation. Process YAML locally in your browser.
Tool
YAML Formatter
Format and beautify YAML online with consistent indentation and syntax validation. Process YAML locally in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free YAML Formatter to clean up configuration files, data documents, and YAML snippets. Paste YAML content, validate its structure, normalize indentation, and generate a readable block-style result. The formatter runs directly in your browser, so application settings, deployment files, and other YAML data are not uploaded to a server.
Examples
- name: Alinra active: true tools: 681
- server: host: localhost port: 3000 secure: false
- products: - id: 1 name: Jeans - id: 2 name: Shirt
Frequently Asked Questions
Can comments be preserved?
That depends on the parser. Basic parsing and serialization may remove comments and original formatting details, so the tool should clearly warn when they cannot be preserved.
Are anchors, aliases, and custom tags supported?
Support depends on the selected YAML parser. Documents using advanced YAML features should be reviewed carefully after formatting.
Is my YAML uploaded?
No. YAML parsing and formatting run locally in your browser.
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