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Validate YAML Syntax Online

Validate YAML syntax in your browser, inspect structure details such as indentation and node counts, and review parse errors with location hints. Processing stays local—useful for config and CI file checks.

Quick switch→YAML to JSON
YAMLValidatorConfig
Quick switch:YAML to JSONJSON ValidatorJSON to YAML

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Use cases

  • Check deployment YAML before commit
  • Locate indentation mistakes in config
  • Confirm a document parses before sharing

How to use

  1. Paste YAML text
  2. Validate
  3. Review the status, structure overview, and any errors

Example input and output

YAML

name: uuup
stack:
  - astro

Result

Valid YAML

FAQ

Does validation upload my YAML?

No. Parsing runs entirely in the current page.

Is this a full YAML linter with custom rules?

It focuses on parse validity and structure overview, not project-specific lint rule packs.

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