Format GitHub Actions YAML Online — Workflow Beautifier
Beautify GitHub Actions workflow YAML with 2 or 4 space indent. Comments are not preserved (js-yaml) — all processing stays local.
Developer notes
• Formats via js-yaml load + dump (same limit as beautify-yaml). • Comments and some quoting styles are lost on round-trip. • indentWidth defaults to 2 spaces (GitHub convention). • Pair with validate-github-actions for structural checks.
Options
When teams pick this route
• Clean up hand-edited workflow YAML before opening a PR. • Align indentation across copied examples from Actions docs. • Format a single workflow when Prettier YAML is not configured. • Preview 2 vs 4 space indent for repo style guides.
Worked examples
Messy job steps from a gist
Before
After format
Minimal push workflow
Before
After format
Navigate related CI/CD tools
Validate structure with validate GitHub Actions, format GitLab pipelines via format GitLab CI, or browse the CI/CD hub.
GitHub Actions formatter FAQ
YAML layout only
Are comments preserved?
No. js-yaml round-trip drops comments. Keep a copy if you rely on inline notes, or format with a comment-aware tool locally.
Does this run actionlint?
No — this only reformats YAML. Use validate-github-actions for structural checks, or actionlint in CI for expression and action rules.
What is the size limit?
512 KB per paste (same as DevOps tools). Split large monorepo workflows if needed.
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