01
Paste YAML
Add one YAML document and choose the indentation you need.
Developer Tools
YAML Formatter & Validator
Validate and normalize YAML locally with a visible warning when comments or anchor notation cannot be kept.
0 / 200,000 characters
Data handling
Storage and export controls
- Retention
- The tool's working state is kept only while this page is open. Inputs and results are not saved to persistent storage by Got A Tool.
- Export
- The tool may prepare a result after you run it. It downloads or copies it only when you choose that action.
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How it works
Turn valid YAML into a consistent, reviewable copy
02
Check warnings
Review any note about comments, anchors, or aliases before relying on the result.
03
Copy the result
Use the normalized YAML only after checking its values and structure.
Clear limit
Formatting is a data rewrite.
YAML is parsed into data and then written as a new YAML copy. Values and key order are retained where possible, but comments and original anchor notation are source-level details and are not preserved.
Local processing
Pasted configuration remains in your browser.
Explicit indentation
Choose two or four spaces before creating output.
Parse errors
Invalid YAML produces a visible error instead of partial output.
Source warnings
Comments and anchor notation are reported before copying.
FAQ
Common questions
Are comments retained?
No. YAML comments are source text and are not part of the parsed data, so they do not appear in the formatted copy.
What happens to anchors and aliases?
Their values are resolved into the formatted copy. The original anchor and alias spelling is not preserved.
Does the tool upload configuration?
No. Parsing and formatting happen only in the current browser tab.
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