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Rapid Avro serializer for C# .NET


Avro format combines readability of JSON and data compression of binary serialization.

Apache Wiki

Apache Avro format documentation

AvroConvert Documentation

First steps with Avro in the .NET article

Benchmark and Avro API article


Introducing Avro to the projects brings three main benefits:

  • Reduction of data size and storage cost
  • Decrease of the communication time and the network traffic between microservices
  • Increased security - the data is not visible in plain text format


AvroConvert Apache.Avro Newtonsoft.Json
Rapid serialization ✔️ ✔️ ✔️
Easy to use ✔️ ✔️
Built-in compression ✔️ ✔️
Low memory allocation ✔️ ✔️ ✔️
Support for C# data structures: Dictionary, List, DateTime... ✔️ ✔️
Support for compression codecs Deflate
Readable schema of data structure ✔️ ✔️ ✔️
Data encryption ✔️ ✔️

Full Changelog


Results of BenchmarkDotNet:

Converter Request Time [ms] Allocated Memory [MB] Compressed Size [kB]
Json 672.3 52.23 6044
Avro 384.7 76.58 2623
Json_Gzip 264.1 88.32 514
Avro_Gzip 181.2 75.05 104
Json_Brotli 222.5 86.15 31
Avro_Brotli 193.5 74.75 31

Article describing Avro format specification and benchmark methodology:

Using Avro for communication between your services significantly reduces data size and network traffic. Additionally choosing encoding (compression algorithm) can improve the results even further.

Code samples

  • Serialization
 byte[] avroObject = AvroConvert.Serialize(object yourObject);

  • Deserialization
CustomClass deserializedObject = AvroConvert.Deserialize<CustomClass>(byte[] avroObject);

  • Read schema from Avro object
string schemaInJsonFormat = AvroConvert.GetSchema(byte[] avroObject)

  • Deserialization of large collection of Avro objects one by one
using (var reader = AvroConvert.OpenDeserializer<CustomClass>(new MemoryStream(avroObject)))
    while (reader.HasNext())
        var item = reader.ReadNext();
        // process item
  • Generation of C# models from Avro file or schema
  string resultModel = AvroConvert.GenerateModel(avroObject);
  • Conversion of Avro to JSON directly
  var resultJson = AvroConvert.Avro2Json(avroObject);

Full Documentation

Related Work

  1. AvroConvertOnline - online Avro Schema to C# model converter

  2. Nuget - Library containing functionalities, which enable communication between microservices via Http using Avro data format

  3. Nuget - Library containing components needed for Confluent Kafka integration


The project is CC BY-NC-SA 3.0 licensed.
For commercial purposes purchase AvroConvert on website -


We want to improve AvroConvert as much as possible. If you have any idea, found next possible feature, optimization opportunity or better way for integration, leave a comment or pull request.