YAML Parser Online
Paste YAML to validate it, explore the structure in an interactive tree, and view formatted output with type statistics.
Last updated: May 28, 2026
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Buy me a coffeeWhat is YAML Parser Online?
This online YAML parser validates your YAML document and displays the parsed structure in a collapsible tree view. Each node shows its key and type — object, array, string, number, boolean, or null. The right panel shows a formatted YAML output and statistics about the document's composition.
How to Use YAML Parser Online
Paste YAML into the input panel.
Check the tree on the right — expand/collapse nodes by clicking the arrows.
View type statistics at the bottom.
Copy the formatted output if needed.
Common Use Cases
- Validating a YAML config file before deploying.
- Exploring the structure of a YAML API response.
- Checking YAML syntax errors with a descriptive error message.
- Understanding the shape of a complex YAML document.
Example Input and Output
A YAML document is parsed and shown as a collapsible tree.
name: Alice
address:
city: London
tags:
- admin▾ {3}
name: "Alice"
▾ address: {1}
city: "London"
▾ tags: [1]
0: "admin"Tip
Click any object or array node's arrow to expand or collapse it. Nodes deeper than 3 levels start collapsed to keep the view manageable.
Frequently Asked Questions
What does the tree show?
Each node shows its key (or array index) and value. Objects show a count of keys, arrays show a count of items. Leaf values show their type with color coding.
Does this support multi-document YAML?
No. Multi-document YAML (documents separated by ---) is not currently supported; only the first document is parsed.
Is my YAML sent anywhere?
No. All parsing happens in your browser.
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