You could use https://github.com/sijuv/protobuf-codec . You can check the
test case at
https://github.com/sijuv/protobuf-codec/blob/master/protobuf-codec-json/src/test/java/protobuf/codec/json/JsonCodecTest.javafor
usage. This library is listed under the google protobuf
ThirdPartyAddOns
wiki as
You should probably contact the authors of protobuf-java-format; I'm not
sure if they pay attention to this list.
Base64 is the best way to encode arbitrary (non-text) data as text.
However, it's really up to the JSON converter code you are using to decide
what format to use. As far as I know,
