#schema

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Durable Streams API

Multi-GB/s JSON (de)serialization written in AssemblyScript utilizing elegant SIMD and SWAR algorithms

A Meteor package that extends Mongo.Collection to provide support for specifying a schema and then validating against that schema when inserting and updating.

Schema parser for Protobuf compatible with AsyncAPI JS Parser

Build and manage the AJV instances for the fastify framework

A library of custom GraphQL Scalars for creating precise type-safe GraphQL schemas.

🧡 Official and community plugins for Kubb.

✨ A Pydantic to PySpark schema library

Openapi-core is a Python library that adds client-side and server-side support for the OpenAPI v3.0 and OpenAPI v3.1 and OpenAPI v3.2 specification.

The Generative UI framework

Automatic state replication for multiplayer games ⚡️

Popular Kubernetes CRDs (CustomResourceDefinition) in JSON schema format.

compiler from JSON Schema into idiomatic Rust types

A database migration tool. Supports SQL migrations and Go functions.

OpenAPI Spec Validator is a CLI, pre-commit hook and python package that validates OpenAPI Specs against the OpenAPI 2.0 (aka Swagger), OpenAPI 3.0 and OpenAPI 3.1 specification.

Free database schema discovery and comprehension tool

OpenApi schema validation for OpenApi versions v2, v3.0.x, v3.1.x and v3.2.x

JSON Schema validator written in JavaScript for NodeJS and Browsers

ESLint rules that validate JSON, JSONC, JSON5, YAML, TOML, Markdown frontmatter, JavaScript exports, and Vue custom blocks against their schema.

The fastest embeddable spreadsheet engine - parse, evaluate & mutate Excel workbooks from Rust, Python, or the browser. Arrow-powered, 400+ functions.

CTRF reference implementation in TypeScript

JSON Schema Based Editor

Naive XML & JSON Bindings for python

Sane and flexible OpenAPI 3 schema generation for Django REST framework.

Transpile JSON-Schema (.json) files to JavaScript (.js or .mjs) using ajv

Async runtime for Rust where correctness is structural: region-owned tasks, cancel-correct protocols, capability-gated effects, and deterministic replay testing

Agentic business runtime — Users, Content, Products, Payments, Intelligence. Build your business, not your boilerplate.

The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)

JSON Schema validator for Draft 2020-12, draft 7 and the v1 dialect. Compiles schemas to plain JavaScript on first use, falls back to an interpreter where code generation is blocked, and points at the line that failed. No required binaries.