YAML Formatter

Paste raw YAML to instantly validate and beautify it with syntax highlighting, or convert it to JSON. Clear error messages pinpoint invalid YAML.

Input
Output

How to Use the YAML Formatter

  1. Paste your raw YAML into the input area, or click Import File to load a .yaml or .yml file directly from your computer.
  2. The formatter validates your input as you type — errors appear in the status bar with a description and line number.
  3. Click Format to display beautifully indented, syntax-highlighted YAML in the output panel.
  4. Click To JSON to convert the YAML to formatted JSON — useful for APIs or debugging.
  5. Use Copy to copy the current output to your clipboard.
  6. Use Save to download the formatted output as a .yaml or .json file depending on the active mode.
  7. Use Clear to reset the editor. Your last input is auto-saved in your browser so it survives a page reload.

About This Tool

This YAML formatter works as a YAML validator, YAML linter, YAML beautifier, and YAML-to-JSON converter. Paste any YAML to instantly detect indentation and syntax errors with precise line numbers, then format it cleanly or convert the entire document to JSON.

Commonly used for Kubernetes manifests, Docker Compose files, GitHub Actions workflows, Ansible playbooks, Helm charts, and any other configuration-as-code files. All processing happens in your browser with no data sent to a server.