YAML Formatter, Validator & Beautifier

YAML Formatter, Validator & Beautifier

Represents purity, clarity, and the commitment to honest expression.

Input
Saved
0 LN0 CH
0.00 KB
Diff
Output
0 LN0 CH
0.00 KB

Privacy Promise

Your content never leaves your browser. All processing happens locally on your device using JavaScript. We do not store, record, or transmit your input data to any server.

Client-Side Processing
No Server Logs

Free online tool to format, beautify, and validate YAML files. Convert JSON to YAML, fix structural errors, and ensure valid YAML syntax. Prettier your YAML configuration files instantly.

Key Features

Format & Beautify

Instantly format and beautify YAML files with customizable indentation. Makes YAML configs readable and properly structured for Docker, Kubernetes, CI/CD pipelines.

Validation

Validates YAML syntax and structure in real-time. Detects indentation errors, syntax mistakes, and invalid YAML instantly with clear error messages.

100% Client-Side

All processing happens in your browser. Your YAML configuration files never leave your device, ensuring complete privacy and security.

Frequently Asked Questions

How do I validate YAML?▼
Paste your YAML into the editor. The tool automatically validates syntax and structure, displaying errors with line numbers and descriptions. Common issues like indentation errors and missing colons are detected instantly.
Is my YAML data secure?▼
100% private. All parsing, validation, and formatting happens entirely in your browser. Your configuration files are never uploaded to any server. This is especially important for YAML files containing sensitive infrastructure configs.
What is YAML used for?▼
YAML is used for configuration files in tools like Docker, Kubernetes, GitHub Actions, Ansible, and CI/CD pipelines. It's preferred over JSON for configs because it's more readable and supports comments.
Can I convert JSON to YAML?▼
Yes! Simply paste JSON into the input — the formatter will automatically convert it to properly formatted YAML. This is useful for converting API responses into config files.
What YAML versions are supported?▼
This tool supports YAML 1.2, the latest standard. It's compatible with Docker Compose, Kubernetes manifests, GitHub Actions workflows, and all modern DevOps tools.

What is YAML file?

YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used to write configuration files.

It caters to people using data rather than just computers processing it. YAML is often used for configuration files and in applications where data is being stored or transmitted.

YAML Examples

Here is a simple example of YAML data representing a server config:

name: Production Server
version: 1.0.0
dependencies:
  - name: nginx
    version: 1.18.0
  - name: postgresql
    version: 13.2
settings:
  debug: false
  max_connections: 100

YAML Beautifier helps to perform below tasks:

YAML BeautifierYAML ParserYAML EditorYAML ViewerYAML FormatterYAML Pretty PrintYAML Validator