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YAML Formatter

Parse and format YAML with two-space indentation while retaining document comments where supported.

Convert in your browser · No sign-up

Invalid syntax and duplicate keys are rejected. YAML aliases stay as references; formatting does not execute tags.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Parse and format YAML with two-space indentation while retaining document comments where supported.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

items: [one, two] → items:
  - one
  - two

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: