Choose yaml 1.2 from your device or use the available text controls.
Files stay on your device
YAML to JSON
Convert YAML into formatted JSON with exact numeric values and clear validation errors.
Private browser workspaceInput: YAML 1.2 → Output: JSON
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Your file never leaves this browser
Processing happens locally using browser APIs and on-device code. Closing this tab clears the working data.
How it works01 02 03
Done in three simple steps
Choose the available options and process the input locally.
Review the result, then download it to your device.
Frequently asked questions
Will large numbers be rounded?+
Integer and decimal source values are retained without passing them through ordinary JavaScript floating-point serialization. JSON-incompatible values such as infinity are rejected.
Are my files uploaded?+
No. Processing happens on this device. The tool may download its own code, but source files and output are not sent to a processing server.