YAML Formatter & Beautifier - Free Online Tool

A YAML formatter cleans and indents YAML so keys, lists, and nested objects are easy to read. It catches spacing issues that break parsers and shows structure clearly. Use it for Kubernetes manifests, CI configs, or any YAML file without scrolling through misaligned lines.

1. Paste YAML: Drop in configs, manifests, or pipeline files.
2. Choose indentation: Pick 2 or 4 spaces to match your team style.
3. Get results: View formatted YAML instantly. Copy it or download as a .yml/.yaml file.

• Prevent parser errors: Proper spacing avoids painful indentation bugs.
• Faster reviews: Clean layout speeds code reviews and pair sessions.
• Local privacy: Formatting runs in your browser, keeping secrets and keys on your device.

Use case 1: Kubernetes manifests

Format Deployments or Services to verify selectors, ports, and probes align correctly.

Use case 2: CI/CD pipelines

Beautify GitHub Actions or GitLab CI files to confirm jobs and steps nest as intended.

Use case 3: App configs

Tidy feature flags or env config files before committing.

Basic example

Input: apiVersion: v1\nkind: ConfigMap\nmetadata:{name:app}\ndata:{key:value}
Output:

apiVersion: v1
kind: ConfigMap
metadata:
  name: app
data:
  key: value

Advanced example

Input: Minified GitHub Actions workflow
Output: Formatted jobs with indented steps, env, and secrets blocks.

Tab characters

YAML requires spaces. Replace tabs with spaces if you see parser errors.

Misaligned lists

List dashes must align with their parent key. Adjust indentation until the formatter stops warning.

• Stick to 2-space indent for most YAML; it keeps lines short.
• Validate after formatting with your CLI (kubectl, ansible-lint, or ci runner).
• Pair with the JSON formatter when converting between formats.

• Clean XML files using the XML formatter.
• Format HTML snippets with the HTML formatter.
• Minify JSON for production using the JSON minifier.

Formatting happens locally in your browser. No YAML content is uploaded or stored.