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YAML Tools
12 client-side utilities — format, validate, diff, transform & convert YAML
Load Sample
Clear
Format & View
Formatter
Indent & format
Validator
Check for errors
Viewer
Interactive tree
Transform
Sort Keys
Alphabetical sort
Flatten
Dot-notation & back
Diff
Compare two YAMLs
String Ops
Escape
Quote for YAML
Unescape
Decode quoted
Convert
YAML → JSON
Export as JSON
JSON → YAML
Import from JSON
YAML → CSV
Export tabular
CSV → YAML
Import from CSV
YAML Formatter
Indent
2 spaces
4 spaces
Copy
Download
Format
Input YAML
Paste
Open
Formatted Output
Copy
YAML Validator
Clear
Validate
YAML Input
Paste
Open
YAML Viewer
Expand All
Collapse All
View
YAML Input
Paste
Open
Paste YAML above to see the interactive tree.
Sort Keys
Recursively alphabetise all mapping keys
Copy
Download
Sort
Input YAML
Paste
Open
Sorted Output
Copy
Flatten / Unflatten
Mode
Flatten
Unflatten
Separator
Dot (.)
Underscore (_)
Slash (/)
Copy
Run
Input YAML
Paste
Open
Output
Copy
YAML Diff
Compare two YAML documents and see what changed
Compare
YAML A (original)
Paste
Open
YAML B (modified)
Paste
Open
Paste YAML into both panes to compare
YAML Escape
Wraps a string in double-quotes and escapes special characters
Copy
Escape
Raw String
Paste
Open
Escaped Output
Copy
YAML Unescape
Decodes a quoted YAML scalar back to raw text
Copy
Unescape
Escaped Input
Paste
Open
Unescaped Output
Copy
YAML to JSON
Indent
2 spaces
4 spaces
Copy JSON
Download
YAML Input
Paste
Open
JSON Output
Copy
JSON to YAML
Copy YAML
Download
JSON Input
Paste
Open
YAML Output
Copy
YAML to CSV
Top-level sequence of mappings is exported as rows
Copy CSV
Download
Convert
YAML Input
Paste
Open
CSV Output
Copy
CSV to YAML
First row = field names; numbers & booleans are auto-cast
Copy YAML
Download
Convert
CSV Input
Paste
Open
YAML Output
Copy
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