ToolNest
HomeToolsFavorites
ToolNest

Free online tools for developers, creators, and professionals.

Navigation

  • Tools
  • Guides
  • Favorites
  • Popular Tools

Legal

  • Terms of Service
  • Privacy Policy
  • Licenses
© 2026 ToolNest
  1. Home
  2. Tools
  3. YAML Formatter

YAML Formatter

Format and validate YAML. Pretty-print and fix indentation.

Result
—

Add to favorites for quick access from the home page

Related tools

Tools often used together with this one

YAML to JSON

Convert YAML to JSON and JSON to YAML. Bidirectional conversion with error handling.

⚡ Browser Only🔒 No Upload🚀 Instant Processing

JSON Formatter

Format and validate JSON. Paste minified JSON, get pretty-printed output.

⚡ Browser Only🔒 No Upload🚀 Instant Processing

CSV to JSON

Convert CSV data to JSON format. Paste CSV, get structured JSON.

⚡ Browser Only🔒 No Upload🚀 Instant Processing

JSON Diff

Compare two JSON objects and highlight differences.

⚡ Browser Only🔒 No Upload🚀 Instant Processing
›How it works
  1. 1Paste YAML content.
  2. 2The tool parses and re-serializes with consistent formatting.
  3. 3Invalid YAML shows an error.
  4. 4Copy the formatted output.

Example

Input: key:value
list:[a,b]
Output: key: value
list:
  - a
  - b