Online YAML Formatter

YAML

Online YAML formatter that works directly in your browser. Format YAML files instantly with proper indentation. It runs in your browser, and your input stays on this device.

Back to YAML Formatter

Formatter example

Compare the exact input shape with the cleaned output before opening the editor.

Local preview

Before

input
service: api
ports:
- 80
- 443

After

formatted
service: api
ports:
  - 80
  - 443

Workflow

Use YAML without sending code.

Paste a snippet, run the action, review any highlighted issue, then copy the result back to your work.

Current language
YAML
Current action
YAML Formatter
  1. 01

    Start

    Paste a snippet or full file into the editor.

  2. 02

    Run

    Use Run YAML Formatter from the action bar.

  3. 03

    Review

    Fix syntax issues if processing stops.

  4. 04

    Move

    Use Copy code when the result is ready.

Files
.yaml, .yml
Paste a YAML snippet or a full source file.
Engine
yamlfmt
Runs the browser-side formatter for readable output.
Privacy
Local run
The editor does not send pasted code to a formatting API.
Result
Readable output
Move the formatted code back to your editor.