JSON + ASN.1: smart data starts here
Build with JSON. Deploy with Binary. One Schema.
JER brings JSON and ASN.1 together — readable in development, compact in production, perfectly interoperable everywhere.
The Power Behind Seamless Communication
ASN.1 is used in your cellphone, connected cars, smart city sensors, fintech systems, and even satellites. Its reliability is invisible, but it's everywhere.
From telecom networks to fintech, IoT, satellites, and connected vehicles — ASN.1 has quietly powered the world's most critical data exchanges for decades. It's an international standard designed for clarity, interoperability, and precision — and it works everywhere.
Now with JSON Simplicity
Use JER (JSON) for readability and debugging during development, then switch to compact binary (BER, PER, OER) for deployment — same schema, same code.
ASN.1 JSON Encoding Rule (JER) brings JSON into the ASN.1 world as a fully standardized encoding rule, giving developers the best of both worlds:
- Familiar JSON syntax
- Backed by a strongly typed ASN.1 schema
- Catches errors early — before they reach production
Built for Modern Systems
ASN.1 + JER allows you to catch data inconsistencies early, making debugging easier and reducing costly production errors.
Define your data once. Compile anywhere. Encode in JSON or binary with guaranteed compatibility across platforms, languages, and versions.
Why Teams Love ASN.1 + JER
JSON + ASN.1 (JER) gives your team a strongly typed, flexible, and future-proof foundation for data communication.
- Readable like JSON, rigorous like ASN.1
- Develop with JER, deploy with compact binary — same schema, same code
- Strong typing = early problem detection
- Internationally standardized & patent-free
- Backward-compatible and language-agnostic
- Smaller, clearer schemas (often < 20% the size of equivalents)
Example 1: JER vs Binary
Suppose we have an ASN.1 schema for a simple Rocket message:
ASN.1 Schema
Rocket ::= SEQUENCE {
name UTF8String,
fuel ENUMERATED {
solid,
liquid,
gas
},
speed INTEGER
}
JER (JSON) Encoding
{
"name": "Apollo",
"fuel": "liquid",
"speed": 25000
}
Compact Binary (PER)
06 41 70 6F 6C 6C 6F 40 02 61 A8
Note: The binary version is machine-efficient but not human-readable — perfect for production. The JSON version is easy to read and debug — ideal for development.
Example 2: ASN.1 Schema vs JSON Schema
ASN.1 schema, while offering the same validation semantics is more compact and easier to read and understand by a human. This is especially useful for large schemas. Try generating an ASN.1 schema for your JSON message.
JSON Message
{
"name": "Falcon",
"message": "Hello World",
"fuel": "liquid",
"speed": {
"mph": 18000
},
"payload": [
"Car",
"GPS unit"
]
}
ASN.1 Schema
World-Schema DEFINITIONS
AUTOMATIC TAGS ::=
BEGIN
Rocket ::= SEQUENCE {
name UTF8String (SIZE (1..16)),
message UTF8String DEFAULT "Hello World",
fuel ENUMERATED {solid, liquid, gas, hybrid},
speed CHOICE {
mph INTEGER,
kmph INTEGER
} OPTIONAL,
payload SEQUENCE OF UTF8String
}
END
JSON Schema
{
"type": "object",
"title": "Rocket",
"required": [
"name",
"fuel",
"payload"
],
"properties": {
"name": {
"type": "string",
"minLength": 1,
"maxLength": 16
},
"message": {
"default": "Hello World"
},
"fuel": {
"type": "string",
"enum": [
"solid",
"liquid",
"gas",
"hybrid"
]
},
"speed": {
"type": "object",
"oneOf": [
{
"properties": {
"mph": {
"type": "number"
}
},
"additionalProperties": false
},
{
"properties": {
"kmph": {
"type": "number"
}
},
"additionalProperties": false
}
]
},
"payload": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
Readable. Reliable. Ready for anything.
That's the power of JSON + ASN.1 (JER) — a smarter foundation for modern data communication.