Sign in Start free

YAML Validator

Check YAML syntax and see the parsed structure as JSON.

Runs in your browser - your code is not uploaded. Sign in free to save results to your cloud library. Start free

How to use the YAML Validator

  1. Paste your input, drop a file, open a URL or press Sample.
  2. Pick the options - the result updates as you type (or press Run / Ctrl+Enter).
  3. Copy, download, use the result as the next input, or share a read-only link.
PrivateEverything runs in your browser; nothing is uploaded unless you share or save.
FastEngines load on demand and keep working offline once loaded.
Save & shareKeep results in your library with versions, or share a read-only link.

Related tools

SQL FormatterFormat SQL for MySQL, PostgreSQL, SQL Server, Oracle, SQLite, BigQuery and more.SQL MinifierRemove comments and extra whitespace from SQL (strings are kept).YAML FormatterFormat YAML with Prettier (comments kept).GraphQL FormatterFormat GraphQL queries, mutations and schemas.Markdown FormatterNormalise Markdown: headings, lists, tables and code blocks.PHP FormatterFormat PHP code with Prettier PHP.Java / C# / C++ BeautifierRe-indent brace languages: Java, C#, C, C++, Go, Kotlin, Swift, Dart.JSON5 / JSONC FormatterFormat JSON with comments and trailing commas (tsconfig, VS Code settings).