FormatPaste

YAML Formatter

Paste YAML, format it, and copy clean configuration output.

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Input

Don't paste secrets · formatting is not stored

Output

formatted

Free YAML formatter

Format YAML configuration online

Use this YAML formatter for config files, Docker Compose snippets, CI workflows, Kubernetes fragments, and copied YAML blocks. Paste YAML and copy clean output quickly.

Format YAML config

Clean YAML and YML snippets for easier reading and sharing.

Great for dev tooling

Useful for CI, Docker, Kubernetes, app config, and automation snippets.

Copy-ready output

Paste on the left and copy formatted YAML from the right.

How this YAML formatter helps

Before and after formatting

Paste compact, copied, or hard-to-read YAML into the input pane. FormatPaste cleans common paste artifacts first, then formats the code into readable output that is easier to scan, debug, share, or copy into your editor.

Common YAML formatting use cases

Use it for quick snippets from documentation, AI chat output, Stack Overflow answers, config examples, API responses, old files, minified blocks, and code that picked up line numbers or markdown fences while being copied.

Safe paste reminder

FormatPaste is built for speed, but you should avoid pasting passwords, API keys, tokens, private keys, recovery codes, customer data, or other secrets into any online formatter. Use local tools for sensitive code.

YAML formatting example

Before
services:
  web:
      image: nginx:1.27
      ports: [ "80:80" ]
      environment:
          - NODE_ENV=production
  db:
    image:   postgres:16
After
services:
  web:
    image: nginx:1.27
    ports:
      - "80:80"
    environment:
      - NODE_ENV=production
  db:
    image: postgres:16

When to use a YAML formatter

Fix inconsistent indentation

YAML depends on indentation, and mixing two and four spaces is the most common reason a config file fails to load. Formatting rewrites every level with consistent two-space indentation.

Docker Compose and Kubernetes files

Paste docker-compose.yml services, Kubernetes manifests, or Helm values to line up nested keys and lists before you apply them.

GitHub Actions and CI workflows

Workflow files for GitHub Actions, GitLab CI, and other pipelines get long quickly. Formatting makes jobs, steps, and environment variables easy to scan.

Catch YAML errors before deploy

Because the input is parsed first, a formatting error usually points to a real problem such as a tab character, a missing colon, or a key indented at the wrong level.

More free online formatters

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YAML Formatter FAQ

How do I format YAML online?

Paste YAML into the input pane and formatted output appears automatically.

Can it format YML files?

Yes. YAML and YML content can be pasted and formatted.

Is this YAML formatter free?

Yes. It is free to use.

Does the YAML formatter validate YAML?

Yes. Input is parsed before it is printed, so broken indentation, duplicate keys, or tabs used for indentation return an error instead of output.

Why were my inline lists expanded?

Flow-style lists such as [ "80:80" ] are rewritten as block lists with one "- item" per line. Both styles mean the same data; block style is easier to read and diff.

Are comments kept?

Yes. Comments are kept with the keys they belong to.