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YAML Formatter

Validate and format YAML files

Valid YAML
 
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What is YAML?
 
YAML (YAML Ain't Markup Language) is a human-readable data
                serialization format commonly used for configuration files. It
                uses indentation to represent structure, making it clean and
                easy to read—but also sensitive to whitespace errors.
 
This formatter validates YAML syntax and catches common mistakes
                like tabs (which are not allowed) and missing colons in
                key-value pairs.
 
YAML Syntax Basics
 
 
Key-Value Pairs
 
key: value — Simple assignment with colon and space.
 
 
Nested Objects
 
Use 2-space indentation to nest objects under
                                parent keys.
 
 
Lists
 
- item — List items start with a dash and space.
 
Common YAML Errors
 
ErrorFix
Tabs usedReplace with spaces (2 or 4)
Inconsistent indentUse same number of spaces throughout
Missing colonAdd colon after key names
 
FAQ
 
Why can't I use tabs in YAML?
 
The YAML spec explicitly forbids tabs for indentation.
                        Use spaces only—typically 2 spaces per level.