ASN.1 C Compiler
Generate tight, portable C code from your ASN.1 specifications.
The ASN.1 C Compiler turns your protocol definitions into clean, readable C structs that compile on any platform. Whether you are targeting a resource-constrained microcontroller or a high-throughput server, the generated code is optimized for your environment.
Write once, deploy everywhere. Generated C code has no external dependencies beyond the compact runtime library. It compiles with any standards-compliant C compiler and runs on Linux, Windows, macOS, and embedded targets.
Platform-aware by design. Tell the compiler your target platform’s integer sizes and it selects the optimal C type for every ASN.1 INTEGER — from a single byte to an arbitrary-precision big-int. You control the mapping, not the other way around.
All the encoding rules you need. BER, DER, UPER, APER, OER, XER, and JER are all supported through the same clean API. Switch encoding rules without changing your application code.
Optional extras when you need them. Generate constraint validation functions to catch malformed data at the boundary. Add equality comparison, print functions, or a sample test harness with a configuration toggle. Nothing is forced into your build.