Paste YAML code, get cleanly formatted output with syntax validation. Catch errors instantly. Works entirely in your browser.
Yes, completely free with no limits on usage. No account required, no watermarks, no hidden fees.
Your YAML never leaves your browser. All parsing and formatting happen locally on your device using js-yaml. Nothing is uploaded to any server.
All standard YAML 1.2 features including multi-document files, anchors, aliases, complex keys, sequences, and mappings. The formatter preserves your data structure while normalizing indentation. Note: YAML comments are removed during formatting, as the parser converts YAML to a data structure before re-serializing.
Yes. The tool validates your YAML in real-time as you type and shows detailed error messages with line numbers for any syntax issues.
Yes. You can choose between 2-space and 4-space indentation. The formatter applies your preference consistently across the entire document.