YAML Formatter
Format YAML with consistent indentation for readability.
What this tool does
Format YAML documents with normalized indentation and clean structure so configuration files are easier to review.
Tool interface
Input
Output
Example input
service: {name: api, ports: [3000, 3001]}Example output
service:
name: api
ports:
- 3000
- 3001Step-by-step instructions
- Paste YAML input into the editor.
- Click Transform to parse and format YAML output.
- Copy or download the formatted YAML.
Common use cases
- Making dense content easier to review and debug.
- Standardizing output before sharing queries or payloads.
- Cleaning generated text for readable documentation.
Useful for improving readability of CI configs, deployment manifests, and shared YAML snippets.
Common mistakes to avoid
- Pasting invalid YAML and expecting formatting to succeed.
- Assuming comments and original style are always preserved.
- Using tabs in source YAML indentation.
Frequently Asked Questions
Does YAML Formatter validate syntax?
Yes. Invalid YAML returns a parse error instead of formatted output.
Will key order change?
Parsed key order is generally preserved, but style is normalized.
Can I download formatted YAML?
Yes. Output can be copied or downloaded.
What input format does YAML Formatter expect?
Use the format shown in the example input on this page.
What does YAML Formatter output?
It returns transformed output you can copy or download as `formatted.yaml`.
Why might YAML Formatter return an error?
A common issue is: Pasting invalid YAML and expecting formatting to succeed.
Does YAML Formatter run in the browser?
Yes. Transformations are designed for in-browser usage so you can test and iterate quickly.
Can I copy or download results from YAML Formatter?
Yes. You can copy the result or use the download action when file output is available.
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Related guides
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