YAML Formatter
Paste any YAML and get a canonical, reformatted version. The document is parsed and re-emitted with the indent size and line-width of your choice, so anchors are resolved, quoting is normalized and inconsistent indentation is fixed. Set the line width to 0 to disable wrapping entirely. Powered by the eemeli/yaml library. Runs entirely in your browser — your config never leaves this page.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Formatter
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Tools that work with the same formats — most users open one of these next.
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Frequently asked
Is YAML Formatter free to use?
Yes. YAML Formatter is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — YAML Formatter runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does YAML Formatter work?
Open YAML Formatter, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does YAML Formatter support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. YAML Formatter uses standard web APIs and does not require any plugin, extension, or sign-up.