Schema serialization and deserialization

Paste .proto source, compile it in memory (no protoc required), and convert in both directions: bytes → structured fields → JSON and JSON → bytes. Field names, enum names, nested messages, repeated fields, and maps follow the schema.

Schema definition

proto

.proto sourceClick “Apply schema” after editing; google/protobuf/* standard imports are available

Schema applied

Defined messages (click to fill the target message)

Deserialization: bytes → structure

decode

Target message

Input encoding

Message payloadEnter protobuf bytes or encoded text

Deserialization complete

Message: helloworld.HelloReply
Input bytes: 10
Fields: 3
Unknown fields: None

Field	#	Type	Cardinality	Value	Payload bytes
message	1	string	optional	"hi"	6869
ts	2	int64	optional	1700000000
history	3	message helloworld.HelloRequest	repeated	<unset>

messagestring"hi"

#: 1
Cardinality: optional
Payload bytes: 6869

tsint641700000000

#: 2
Cardinality: optional
Payload bytes

historymessage helloworld.HelloRequest<unset>

#: 3
Cardinality: repeated
Payload bytes

JSON

{
  "message": "hi",
  "ts": "1700000000"
}

Serialization: JSON → bytes

encode

Message JSON (canonical mapping; int64 may also be a string)Enter JSON matching the current schema

Serialization complete

Message: helloworld.HelloReply
Output bytes: 28
Fields: 3

hex

0a0268691080e2cfaa061a100a046772706310031a01611a01622001

base64

CgJoaRCA4s+qBhoQCgRncnBjEAMaAWEaAWIgAQ==

Field structure

Field	#	Type	Cardinality	Value	Payload bytes
message	1	string	optional	"hi"	6869
ts	2	int64	optional	1700000000
history	3	message helloworld.HelloRequest	repeated	[]

messagestring"hi"

#: 1
Cardinality: optional
Payload bytes: 6869

tsint641700000000

#: 2
Cardinality: optional
Payload bytes

historymessage helloworld.HelloRequest[]

#: 3
Cardinality: repeated
Payload bytes