YAML Formatter
Format, validate and convert YAML.
Runs entirely in your browser — your data is never uploaded to any server.
How it works
- Paste your YAMLA config file, manifest or pipeline.
- Choose the outputReformatted YAML or JSON.
- Copy the resultValidated and consistently indented.
What this tool does
- Full YAML 1.2 parsing
- Two-way YAML and JSON conversion
- Errors reported with line and column
- Local processing — safe for infrastructure config
Frequently Asked Questions
Almost always indentation: tabs are not allowed for indentation, and levels must be consistent. The error message gives the exact line.
Yes, choose JSON as the output format. JSON input is also accepted, since JSON is valid YAML.
No. YAML comments are not part of the parsed data, so reformatting discards them.
No. Everything is parsed in your browser.
Privacy and security
Your input is processed by JavaScript running inside your browser. Nothing you paste is sent over the network, logged, or stored — which is what makes this safe to use with production data. If you want to check this yourself: open your browser’s developer tools, switch to the Network tab, and use the tool — you will see no request carrying your file or input leave the page.
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