Does this validate my YAML?

Yes, invalid YAML shows a clear parsing error instead of silently producing wrong output.

What indentation does it use?

Output is normalized to 2-space indentation regardless of the input's spacing.

Are comments preserved?

No, comments are stripped during parsing since this focuses on structural reformatting.

Can it handle nested lists and maps?

Yes, arbitrary nesting of maps and lists is supported.

YAML Formatter

Beautify and normalize YAML with a hand-written parser.

Works Offline

Privacy First

No Login

No API

YAML input

Beautified YAML

name: Ada
skills:
  - logic
  - math
address:
  city: London
  zip: "90210"

About the YAML Formatter

Paste messy or inconsistently indented YAML and get a cleanly re-serialized version with normalized 2-space indentation, consistent quoting, and preserved nested maps and lists — all parsed locally with a hand-written YAML parser.

Examples

Messy indentation

name: Ada
skills:
    - logic

Output

name: Ada
skills:
  - logic

Related tools

Base64 to Image Converter

Converters

Convert between base64/data URI text and image previews.

Binary/Octal Text Converter

Converters

Convert text to binary or octal codes and back.

Csv To Json

Converters

Convert between CSV and JSON with delimiter and header options.

Csv To Markdown Table

Converters

Convert CSV into a Markdown or HTML table with alignment options.

CSV to SQL INSERT

Converters

Generate SQL INSERT statements from CSV data.

CSV to XML

Converters

Convert CSV data into well-formed XML with custom tag names.

Frequently asked questions

Version 1.0.0 · Updated 2026-08-11 · Runs entirely in your browser