YAML Viewer Online

What is YAML?

YAML (short for "yet another markup language” also known as “YAML Ain’t Markup Language") is a human-readable data serialization format used extensively for configuration files and data exchange between programming languages. It is designed to be easy to read and write, making it a popular choice for developers, system administrators, and DevOps professionals.

YAML’s structure relies on indentation rather than brackets or tags, which makes it visually cleaner and simpler than formats like XML or JSON. It supports complex data types like lists, dictionaries (key-value pairs), and nested structures, allowing you to represent everything from simple settings to deeply nested configurations.

What is a YAML Reader (Viewer)?

A YAML reader (Viewer) is a tool that takes raw YAML input and formats it into an easy-to-read, hierarchical structure. It highlights syntax, validates the data format, and helps you navigate complex configurations without the need for local software.

How to use YAML Visualizer?

• Enter Your YAML: In the Input section at the top
  • Paste your YAML content directly into the textbox. Or, type YAML manually if you want to test small snippets.
  • You can also use the toolbar buttons on the right side to:
    • 🔁 Reset the input
    • 📋 Paste from clipboard
    • ⬇️ Download the content
• Auto Update (Optional): By default, the “Auto Update” checkbox is enabled. This means the output updates automatically as you type. Uncheck it if you prefer to control when the YAML is parsed.
• Click “YAML Tree View”: After entering your YAML, click the black “YAML Tree View” button. This will format and convert your raw YAML into a clean, hierarchical structure. It helps you visually inspect nested data with ease.
• View the Output: In the Output section at the bottom
  • See the formatted and structured version of your YAML.
  • Use the toolbar icons to:
    • 📋 Copy the output
    • ⬇️ Download the formatted result

Frequently Asked Questions (FAQs)

Can I convert YAML to JSON using this tool?

While this tool is primarily a YAML viewer, some versions include a built-in converter. If supported, you’ll find an option or button labeled “Convert to JSON.” Otherwise, you can use our YAML to JSON Converter tool for that purpose.

Does this tool validate YAML syntax?

Yes, the viewer checks your YAML for proper syntax. If there's an error (like inconsistent indentation or invalid characters), it will notify you in the output area so you can fix it quickly.

Is my YAML data stored or shared anywhere?

No. This tool is completely client-side. All processing happens in your browser, and none of your data is sent to our servers or saved.

What file types can I upload here?

You can upload .yaml or .yml files. These are both standard YAML file extensions and are fully supported by the viewer.

Does it support large YAML files?

The tool can handle reasonably large YAML files, but performance may vary depending on your browser and device. For extremely large files, breaking them into smaller parts is recommended.

Can I use this tool offline?

Currently, the tool requires an internet connection to load. However, since it runs in-browser, you could technically use it offline if saved locally, but we recommend using it online for full functionality and updates.