FreeDev Tools

YAML Formatter

Format, validate, and re-indent YAML — with key sorting and flow-level control.

Runs locally in your browser. Your input is not uploaded.

How to Use

  1. 1

    Paste your YAML

    Config files, Kubernetes manifests, CI pipelines — anything YAML.

  2. 2

    Set the options

    Choose 2- or 4-space indent, key sorting, and inline collections.

  3. 3

    Copy the clean output

    Syntax errors are reported with line numbers if parsing fails.

Frequently Asked Questions

It parses your YAML (validating it in the process) and re-emits it with consistent indentation, normalized spacing, and expanded inline collections — powered by the js-yaml library.

Related Tools

CSS FormatterMinify or beautify CSS stylesheetsJS FormatterMinify or beautify JavaScript codeHTML FormatterBeautify or minify HTML markupHTML EscapeEscape special HTML characters to entitiesHTML StripperRemove all HTML tags to extract plain textHTML EntitiesSearchable reference for all HTML entity codesSQL FormatterBeautify and format SQL queriesXML FormatterFormat, validate, and minify XML documents instantly