YAML Viewer – View & Validate YAML Online
Open, inspect, search, validate, and explore YAML documents locally with an interactive tree structure, path finder, and depth statistics.
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YAML Viewer Features
Explore, validate, and inspect YAML configurations seamlessly
🌲 Interactive Tree View
Expand and collapse nested mappings, sequences, and scalars with color-coded badges.
📍 Node Path Generator
Click any YAML key or list item to copy its exact path (e.g. $.services.web.ports[0]).
🔍 Real-time Search & Filter
Search keys and values with live matching indicators and visual result highlights.
📊 Indentation & Depth Metrics
Track total objects, list items, total keys, maximum nesting depth, and file size automatically.
❌ Indentation Error Spotter
Detects syntax errors, tab vs space indentation conflicts, and unclosed quotes with line numbers.
🔒 100% Client-Side Privacy
Zero external requests. Your YAML configuration files stay 100% inside your local browser memory.
Find the setting you need in a YAML file
Configuration files can be hard to scan when they contain nested sections, lists, and many repeated keys. Open the YAML document to explore its structure, search for a setting, and copy or download the content after you have found the relevant section.
Paste the YAML or open the local file you want to inspect.
Expand or browse the structure and use search to locate the key, value, or section you need.
If the document shows a parsing or indentation warning, inspect the surrounding lines. Copy or download the content only after checking the part you intend to use.
Indentation determines what belongs together
In YAML, moving a line left or right can change whether a setting belongs to a parent object or a list item. When a value seems to be missing, check the nesting and nearby indentation before assuming the key does not exist. Quoted strings and values that resemble booleans or numbers may also need attention.
A viewer helps you read the document, but a configuration can be syntactically valid and still use a setting your application does not support. Keep the original file and validate application-specific rules before replacing a working configuration.
Frequently Asked Questions
Is my YAML data safe when using this YAML Viewer?
Yes, 100%. All YAML parsing, validation, and tree building happen entirely inside your local browser. No data or files are sent to any external server.
Which file extensions are supported?
The tool supports .yaml, .yml, .txt, and raw text input.
How does the YAML Viewer handle indentation and syntax errors?
The built-in parser automatically detects indentation mismatch, unclosed quotes, or invalid colons, highlighting the error line number and detailed syntax message.
Can I copy the path of a specific YAML node?
Yes! Click any key or value in the tree view to reveal its path (e.g. $.services.web.ports[0]) and click Copy Path.