Format GitHub Actions YAML Online — Workflow Beautifier

Beautify GitHub Actions workflow YAML with 2-space indent. Comments are not preserved (js-yaml) — all processing stays local.

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GitHub Actions formatter — workflow YAML playbook
Normalize GitHub Actions workflow YAML before review or paste into docs. Indentation only — not a semantic rewriter.

Developer notes

• Pretty-prints workflow YAML with 2-space indent (GitHub convention). • Auto-format on paste/upload/sample; manual edits use the Format button (⌘↵). • Comments may be dropped by the YAML round-trip (silent). • Pair with validate-github-actions for structural checks.

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. • Quick normalize before validate-github-actions structural checks.

Worked examples

Messy job steps from a gist

Before

name: CI on: push jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - run: npm test

After format

name: CI on: push jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - run: npm test

Minimal push workflow

Before

name: CI on: push jobs: build: runs-on: ubuntu-latest steps: - run: echo hi

After format

name: CI on: push jobs: build: runs-on: ubuntu-latest steps: - run: echo hi

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.

CI/CD

GitHub Actions and GitLab CI — format YAML and check workflow/job structure in your browser.

Explore other tool categories

Minify

Shrink code and assets for production — minify JavaScript, CSS, HTML, JSON and XML before gzip or CDN deploy.

Beautify

Make code readable with consistent indentation — beautify JavaScript, CSS, TypeScript, SCSS, LESS, Markdown, GraphQL, SQL, YAML and more in your browser.

Unminify

Expand minified or compressed code — unminify JavaScript, CSS, TypeScript, SCSS, LESS, SQL, YAML and other formats when debugging or reviewing.

Conversion

Transform data between JSON, YAML, XML and CSV locally — no server uploads.

CSS preprocessors

Compile SCSS or LESS to standard CSS in the browser — pair with beautify or minify for a full stylesheet workflow.

JSON Tools

Validate, format, diff and explore JSON payloads — complementary to minifiers and converters.

SVG Tools

Preview, optimize with SVGO, export Data URI, resize, beautify, convert to JSX and validate SVG — all in your browser.

DevOps & Infra

Terraform HCL format/validate/minify, Dockerfile format & lint, Docker Compose and .env validation.

Logs & observability

Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.

Kubernetes

Multi-doc manifests, structural validate, Ingress/Deployment starters, and Helm values formatting.

Networking / IP

CIDR, subnets, and IPv4/IPv6 helpers — in your browser.

Security & tokens

JWKS, X.509 certificates, and secrets scan — browser-local.

API & schemas

OpenAPI tools to format, validate, and lint your specs.

Encoding

Encode or decode Base64, URL components and HTML entities — client-side only.

Developer utilities

Timestamps, UUID, ULID, Nanoid, cron, passwords, regex, slugify, number bases, case, text diff, and chmod — all client-side.

Text & Markdown

Count words, build Markdown TOCs, and clean line lists — all in your browser.

Serialization

Serialize and deserialize PHP data structures beside JSON workflows.