sksamuel/hoplite

Health v2 · maintenance only

Adoption not part of the score

1045 stars · 89 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Hoplite is a boilerplate-free Kotlin library for loading configuration files into typesafe data classes. It supports multiple formats (YAML, JSON, TOML, HOCON, properties), cascading config layers, environment variable and system property overrides, and detailed error reporting.

Use cases

• load yaml config into kotlin data classes
• type-safe configuration loading for jvm apps
• layer environment-specific config files over defaults
• resolve secrets from aws secrets manager in config
• fail fast on missing or invalid config values
• reload configuration at runtime
• override config values via environment variables

When to choose

• you write Kotlin/JVM apps and want config mapped directly to data classes with no boilerplate
• you need to mix multiple config formats or stack cascading config files
• you want clear, detailed errors for missing or mistyped config values
• you need preprocessors for secrets managers or reloadable config

When to avoid

• you are not on the JVM or not using Kotlin
• you need config loading at compile time rather than runtime
• you only need simple key-value properties without type conversion

Facets

library · maturity active

configuration-management serialization json yaml developer-tools backend jvm cross-platform kotlin config-loader data-classes hocon toml type-safe-config secrets-manager environment-variables jvm

Member repositories

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