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YAML ↔ Properties Converter
Convert YAML (YML) to Java .properties and back in your browser. Nested keys use dot notation and comments are preserved — nothing is uploaded.
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Result will appear here.
All files are processed only in your browser and are never uploaded to any server.
Quick answer
Convert YAML to Java .properties and back free in your browser: nested keys are flattened with dot notation such as server.port=8080, comments are preserved, and you can copy or download the result. No data leaves your device.
- Input
- YAML (YML) or .properties · paste, or load a file
- Output
- Copy to clipboard, or download as .yml / .properties
- Nested keys
- Flattened with dot notation · rebuilt when converting back
- Comments
- Preserved in both directions
- Syntax highlighting
- Yes · YAML and .properties
- Data sent to a server
- None · everything runs locally
- Price
- Free · no registration
- Works on
- Any modern browser · Windows, macOS, Linux, iOS, Android
How to use this YAML ↔ Properties Converter
- Paste YAML or .properties content into the input box.
- Choose the conversion direction (YAML → Properties or Properties → YAML).
- Copy or download the result.
Frequently Asked Questions
How are nested keys handled?
When converting to .properties, nested keys are flattened using dot notation (for example server.port=8080). Converting back rebuilds the nested structure.
Is my data private?
Yes. Conversion happens entirely in your browser; nothing is uploaded to any server.
Are comments preserved?
Yes. # comments in YAML and # or ! comments in .properties are carried over and attached to the corresponding key. Blank lines and alignment are not preserved.