YAML Formatter

Format and beautify YAML. Note: comments are lost (js-yaml limitation)

Key Facts

Category
Conversion & Encoding
Input Types
textarea, number, select
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The YAML Formatter is a utility tool designed to clean, structure, and minify YAML data. It allows you to adjust indentation sizes and toggle between beautifying and minifying modes to ensure your configuration files are syntactically correct and easy to read.

When to Use

  • •When you need to fix indentation errors or clean up messy YAML configuration files.
  • •When you want to compress YAML data into a minified format to reduce payload size.
  • •When you need to standardize the indentation size across different YAML documents.

How It Works

  • •Paste your raw YAML data into the input text area.
  • •Select your preferred formatting mode (Beautify or Minify) and set the indentation size.
  • •The tool parses the YAML input and outputs the formatted or minified result instantly.

Use Cases

Formatting Kubernetes deployment manifests for better readability.
Minifying CI/CD pipeline configurations to save space.
Standardizing indentation in application configuration files.

Examples

1. Beautifying a Kubernetes Manifest

DevOps Engineer
Background
A DevOps engineer has a messy Kubernetes deployment YAML file with inconsistent spacing that causes deployment errors.
Problem
The manifest has mixed 2-space and 4-space indentations, making it hard to debug.
How to Use
Paste the messy YAML into the input, set the Indent Size to 2, select Beautify mode, and copy the formatted output.
Example Config
Indent Size: 2, Mode: Beautify
Outcome
The Kubernetes manifest is perfectly aligned with consistent 2-space indentation, resolving syntax issues.

2. Minifying a Docker Compose Configuration

Software Developer
Background
A developer wants to compress a Docker Compose file to embed it as a compact payload in an API request.
Problem
The YAML file contains unnecessary whitespace and line breaks.
How to Use
Paste the Docker Compose YAML, select Minify mode, and run the formatter.
Example Config
Mode: Minify
Outcome
The YAML is compressed into a compact, minimal-space format suitable for API payloads.

Try with Samples

yaml
YAML Samples
YAML (YAML Ain't Markup Language) format examples from simple to complex structures
title token yaml
yaml
Kubernetes YAML Samples
Complete Kubernetes YAML manifests for Deployment, Service, ConfigMap, Secret, Ingress and other essential resources
title token yaml
yaml
Distributed Tracing Samples
Comprehensive distributed tracing examples using Jaeger, OpenTelemetry, and other modern observability tools for microservices architecture
preferred input family yaml
yaml
Grafana Advanced Application Samples
Comprehensive Grafana samples covering advanced dashboard design, alerting configurations, data source integrations, and plugin development
preferred input family yaml
yaml

Related Hubs

Configuration File Conversion and Environment Diff Tools
Parse .env files, convert YAML/TOML/HCL configs, merge config fragments, and compare environment drift in one configuration workflow hub.
Text Redaction, Highlighting, and Presentation Formatting Tools
Compare tools for masking sensitive text, finding PII, normalizing phone numbers, highlighting phrases, centering text, and formatting diffs in one hub.
JSON Formatting, Diff, and Normalization Tools
Compare JSON formatting, diffing, log review, config comparison, and data-normalization tools in one hub for readable and reviewable JSON workflows.

FAQ

Will my comments be preserved after formatting?

No, comments are lost during formatting due to parser limitations.

What indentation sizes are supported?

You can set the indentation size anywhere from 0 to 8 spaces.

Can I minify my YAML files?

Yes, you can switch the mode option to Minify to compress your YAML data.

Does this tool validate YAML syntax?

Yes, it parses the input, which helps identify syntax errors in your YAML structure.

Is there a file size limit for formatting?

The tool runs in your browser and can handle standard configuration files efficiently.

API Documentation

Request Endpoint

POST /en/api/tools/yaml-formatter

Request Parameters

Parameter Name Type Required Description
yamlInput textarea Yes -
indentSize number No -
mode select No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-yaml-formatter": {
      "name": "yaml-formatter",
      "description": "Format and beautify YAML. Note: comments are lost (js-yaml limitation)",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=yaml-formatter",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]