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YAML formatter
Reindent YAML, normalize its presentation, and detect common structural issues directly in your browser.
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- Works offline
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Why use this tool?
Format a YAML document to get more consistent indentation and make structural problems easier to spot before reuse. It is useful for configuration files, CI/CD pipelines, manifests, and any YAML where nesting depends on indentation.
Smart processing
Generate, convert, or validate technical data with purpose-built controls.
Supported formats
Technical formats and syntaxes suited to each generator, converter, or validator.
Save time
Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.
Guide
How to use this tool
- 1
Paste the YAML document
Enter the YAML content you want to check and reformat.
- 2
Choose indentation and format
Select the indentation level you want and run the formatter.
- 3
Fix any reported issues
Review the result and correct structural problems before copying the final document.
Tips and best practices
- In YAML, indentation is part of the data structure, so a few spaces can change the meaning of the document.
- Pay particular attention to lists, nested objects, and multiline blocks when working with complex YAML.
- After formatting, validate the file in the application or service that will consume it when that system enforces its own schema.
Frequently asked questions
Does the formatter automatically repair invalid YAML?
No. It can report detected problems, but structurally invalid YAML must be corrected before it can be formatted reliably.
Why is indentation so important in YAML?
Because indentation directly defines nesting levels and relationships between data.
Can I use the tool for configuration files?
Yes, as long as the content is YAML. You should still validate the result against the rules of the target application.
Is my YAML uploaded to a server?
No. Formatting runs locally in your browser.
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