GREsau/schemars

Health v2 · maintenance only

Adoption not part of the score

1403 stars · 304 forks observed · 2026-08-28

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

Schemars is a Rust library that generates JSON Schema documents from Rust types via a JsonSchema trait and #[derive(JsonSchema)] macro. It is designed to stay compatible with Serde, honoring #[serde(...)] attributes so generated schemas match serde_ serialization behavior.

Use cases

• generate schema from rust structs
• validate payloads against rust types
• document serde serialization formats
• generate openapi schemas for rust api types
• produce schema for config file formats
• keep schema in sync with serde attributes

When to choose

• you write Rust and need JSON Schema documents matching your serde types
• you want schema generation via a simple derive macro
• you need serde attribute compatibility (rename, skip, flatten, etc.)
• you need no_std support or integrations with chrono, uuid, bytes and similar crates

When to avoid

• you need JSON Schema from non-Rust sources
• you need OpenAPI document generation itself rather than raw schemas
• your project is not in the Rust ecosystem

Facets

library · maturity stable

serialization developer-tools developer-tools apis backend rust cross-platform -schema serde derive-macro schema-generation

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