Binary Data in JSON String. Something better than Base64

The JSON specification requires that binary data be encoded as a string. Base64 is the ubiquitous solution, but it introduces a ~33% size overhead. In contexts where bandwidth or payload size is critical (e.g., high-frequency APIs, mobile applications, or cloud storage specifications like CDMI), this overhead is significant. Given the constraints of the JSON string format, what standardized, text-

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バイナリ JSON Base64