Self-Hosted Elixir JSON Libraries: Jason vs Poison vs Jsonex vs Jsonrs

Sat, 25 Jul 2026 00:00:00 +0000

Introduction

In the Elixir ecosystem, JSON parsing and encoding is one of the most common operations — from API responses to configuration files and message passing between services. While Erlang’s built-in string handling is powerful, Elixir’s functional programming paradigm demands libraries that are both fast and idiomatic. Choosing the right JSON library affects your entire application’s throughput, especially in high-traffic Phoenix web applications and real-time systems.

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Self-Hosted Elixir JSON Libraries: Jason vs Poison vs Jsonex vs Jsonrs

Introduction