Package category

Schema validation

Validate data shapes, parse untrusted input and infer types from schemas.

673 packages20 comparisons

Packages compared

673 packages

Package	Weekly downloads	12-month change	52 weeks	Gzip	Last release	Module	Types	Categories
@t3-oss/env-nextjs ![NPM Version](https://img.shields.io/npm/v/%40t3-oss%2Fenv-core) [![JSR](https://jsr.io/badges/@t3-oss/env-core)](https://jsr.io/@t3-oss/env-core) [![JSR Score](https://jsr.io/badges/@t3-oss/env-core/score)](https://jsr.io/@t3-oss/env-core) [![Socket Bad	2.2m	+268%		-	6 months ago 0.13.11	ESM only	Bundled	Schema validation, Static site generators and meta-frameworks
tv4 A public domain JSON Schema validator for JavaScript	2.2m	-1%		-	9 years ago 1.3.0	CommonJS	None	Schema validation
drizzle-zod Generate Zod schemas from Drizzle ORM schemas	2.2m	+212%		-	1 year ago 0.8.3	ESM + CommonJS	Bundled	ORMs and query builders, Schema validation
graphql-scalars A collection of scalar types not included in base GraphQL.	2.2m	+107%		-	1 month ago 2.0.0	ESM + CommonJS	Bundled	GraphQL, Schema validation
z-schema Fast, lightweight JSON Schema validator for Node.js and browsers — full support for draft-04, draft-06, draft-07, draft-2019-09, and draft-2020-12 (latest)	2.2m	+1%		-	8 days ago 12.4.6	ESM + CommonJS	Bundled	Schema validation
valid-data-url Detect if a string is a data URL	2.1m	+97%		-	3 years ago 5.0.0	CommonJS	None	URLs and query strings, Schema validation
validate.io-array Validates if a value is an array.	2.1m	+89%		-	11 years ago 1.0.6	CommonJS	None	Schema validation
@bufbuild/protoplugin Helps to create your own Protocol Buffers code generators.	2.1m	+301%		-	14 days ago 2.15.0	ESM + CommonJS	Bundled	Schema validation, TypeScript tooling
validate.io-function Validates if a value is a function.	2.1m	+88%		-	11 years ago 1.0.2	CommonJS	None	Schema validation
io-ts TypeScript runtime type system for IO decoding/encoding	2m	+22%		-	1 year ago 2.2.22	ESM + CommonJS	Bundled	TypeScript tooling, Schema validation
zod-from-json-schema Creates Zod types from JSON Schema at runtime	1.9m	+748%		-	2 months ago 0.5.6	ESM + CommonJS	Bundled	Schema validation
mutation-testing-report-schema The json schema for a mutation testing report.	1.8m	+1214%		-	1 month ago 3.9.0	ESM only	Bundled	Testing, Schema validation
json-schema-resolver Resolve all your $refs	1.8m	+216%		-	1 year ago 3.0.0	CommonJS	None	Schema validation
json-schema-compare Compare json schemas smarter.	1.7m	+67%		-	8 years ago 0.2.2	-	-	Schema validation
ajv-i18n Internationalised error messages for Ajv JSON validator	1.7m	+940%		-	4 years ago 4.2.0	-	-	Internationalisation, Schema validation
validate.io-integer Validates if a value is an integer.	1.7m	+68%		-	11 years ago 1.0.5	-	-	Schema validation
validate.io-number Validates if a value is a number.	1.7m	+68%		-	11 years ago 1.0.3	-	-	Schema validation
validate.io-integer-array Validates if a value is an integer array.	1.6m	+71%		-	11 years ago 1.0.0	-	-	Schema validation
json-schema-to-zod Converts JSON schema objects or files into Zod schemas	1.5m	+477%		-	5 months ago 2.8.1	-	-	Schema validation
@scalar/validation A lightweight, schema-first validation library for Scalar	1.5m	-	-	-	1 day ago 0.6.5	-	-	Schema validation
json-schema-merge-allof Simplify your schema by combining allOf into the root schema, safely.	1.5m	+70%		-	5 years ago 0.8.1	-	-	Schema validation
is-my-json-valid A [JSONSchema](https://json-schema.org/) validator that uses code generation to be extremely fast.	1.4m	-2%		-	4 years ago 2.20.6	-	-	Schema validation
@mastra/schema-compat Tool schema compatibility layer for Mastra.ai	1.3m	-	-	-	3 days ago 1.3.11	-	-	Schema validation
@json-render/core JSON becomes real things. Define your catalog, register your components, let AI generate.	1.2m	-	-	-	6 days ago 0.21.0	ESM + CommonJS	Bundled	Schema validation
express-validator Express middleware for the validator module.	1.1m	+14%		-	5 months ago 7.3.2	CommonJS	Bundled	Schema validation, HTTP servers and web frameworks
zod-openapi Convert Zod Schemas to OpenAPI v3.x documentation	994k	+287%		-	25 days ago 6.0.2	ESM + CommonJS	Bundled	Documentation tooling, Schema validation
swagger-parser Swagger 2.0 and OpenAPI 3.0 parser and validator for Node and browsers	985.9k	-3%		-	5 years ago 10.0.3	CommonJS	Bundled	Schema validation, Documentation tooling
hono-openapi OpenAPI schema generator for Hono	971.7k	+391%		-	12 days ago 1.3.3	ESM + CommonJS	Bundled	Documentation tooling, Schema validation
json-schema-ref-parser Parse, Resolve, and Dereference JSON Schema $ref pointers	968.9k	+2%		-	5 years ago 9.0.9	CommonJS	Bundled	Schema validation, Parsers and serialisers
parse-semver Parse, normalize and validate given semver shorthand (e.g. gulp@v3.8.10) to object.	968.5k	+95%		-	10 years ago 1.1.1	CommonJS	None	Schema validation
airbnb-prop-types Custom React PropType validators that we use at Airbnb.	967.6k	-22%		-	6 years ago 2.16.0	CommonJS	None	React, Schema validation
tcomb-validation General purpose validation library for JavaScript	929.9k	-25%		-	9 years ago 3.4.1	CommonJS	Bundled	Schema validation
convict Featureful configuration management library for Node.js (nested structure, schema validation, etc.)	883.5k	+44%		-	6 months ago 6.2.5	CommonJS	None	Configuration, Schema validation
@metamask/superstruct A simple and composable way to validate data in JavaScript (and TypeScript).	813.8k	-	-	-	2 months ago 3.4.1	ESM + CommonJS	Bundled	Schema validation, HTTP servers and web frameworks
@scalar/typebox Json Schema Type Builder with Static Type Resolution for TypeScript	806.3k	-	-	-	8 months ago 0.1.3	ESM + CommonJS	Bundled	Schema validation, TypeScript tooling
exact-mirror Mirror exact value to TypeBox/OpenAPI model	785.7k	+644%		-	18 days ago 1.2.6	ESM + CommonJS	Bundled	Schema validation
is-base64 Predicate that returns true if base64 string.	782.7k	+82%		-	6 years ago 1.1.0	CommonJS	None	Cryptography and hashing, Schema validation
fastify-type-provider-zod Zod Type Provider for Fastify@5	777.4k	+509%		-	3 months ago 7.0.0	ESM + CommonJS	Bundled	HTTP servers and web frameworks, Schema validation
graphql-query-complexity Validation rule for GraphQL query complexity analysis	772k	+108%		-	2 months ago 2.0.0	ESM + CommonJS	Bundled	GraphQL, Schema validation
@readme/openapi-parser Swagger 2.0 and OpenAPI 3.x parser and validator for Node and browsers	768.9k	-	-	-	21 days ago 9.0.0	ESM + CommonJS	Bundled	Documentation tooling, Schema validation
validate.js Declarative validations for JavaScript	760.7k	+53%		-	7 years ago 0.13.1	CommonJS	Bundled	Schema validation
v8n Dead simple fluent JavaScript validation library	731.8k	+309%		-	4 years ago 1.5.1	ESM + CommonJS	Bundled	Schema validation
revalidator A cross-browser / node.js validator powered by JSON Schema	714.2k	+12%		-	11 years ago 0.3.1	CommonJS	None	Schema validation
ts-json-schema-generator Generate JSON schema from your Typescript sources	687.5k	+116%		-	6 months ago 2.9.0	CommonJS	Bundled	Schema validation, TypeScript tooling
untruncate-json Fix up the end of a partial JSON string to create valid JSON.	686.8k	+841%		-	6 years ago 0.0.1	ESM + CommonJS	Bundled	Schema validation
@readme/openapi-schemas JSON Schemas for every version of the OpenAPI Specification	679.2k	-	-	-	2 months ago 4.0.0	ESM + CommonJS	Bundled	Documentation tooling, Schema validation
@swaggerexpert/cookie RFC 6265 compliant cookie parser, validator and serializer.	649.1k	-	-	-	1 year ago 2.0.2	ESM + CommonJS	Bundled	Schema validation
@inversifyjs/prototype-utils Prototype related utils	646.3k	-	-	-	6 months ago 0.2.1	ESM only	None	Node.js utilities, Schema validation
json-schema-to-typescript-lite Lite version of json-schema-to-typescript	629.1k	+139%		-	1 year ago 15.0.0	ESM + CommonJS	Bundled	TypeScript tooling, Schema validation
npm-user-validate User validations for npm	574.9k	-15%		-	4 months ago 5.0.0	CommonJS	None	Schema validation

12-month change compares the average of the last 4 weeks of downloads with the first 4 weeks of the 52-week series. Gzip size is for the whole package, as measured by Bundlephobia. "-" means the value has not been fetched.

What each package is

@t3-oss/env-nextjs![NPM Version](https://img.shields.io/npm/v/%40t3-oss%2Fenv-core) [![JSR](https://jsr.io/badges/@t3-oss/env-core)](https://jsr.io/@t3-oss/env-core) [![JSR Score](https://jsr.io/badges/@t3-oss/env-core/score)](https://jsr.io/@t3-oss/env-core) [![Socket Bad
tv4A public domain JSON Schema validator for JavaScript
drizzle-zodGenerate Zod schemas from Drizzle ORM schemas
graphql-scalarsA collection of scalar types not included in base GraphQL.
z-schemaFast, lightweight JSON Schema validator for Node.js and browsers — full support for draft-04, draft-06, draft-07, draft-2019-09, and draft-2020-12 (latest)
valid-data-urlDetect if a string is a data URL
validate.io-arrayValidates if a value is an array.
@bufbuild/protopluginHelps to create your own Protocol Buffers code generators.
validate.io-functionValidates if a value is a function.
io-tsTypeScript runtime type system for IO decoding/encoding
zod-from-json-schemaCreates Zod types from JSON Schema at runtime
mutation-testing-report-schemaThe json schema for a mutation testing report.
json-schema-resolverResolve all your $refs
json-schema-compareCompare json schemas smarter.
ajv-i18nInternationalised error messages for Ajv JSON validator
validate.io-integerValidates if a value is an integer.
validate.io-numberValidates if a value is a number.
validate.io-integer-arrayValidates if a value is an integer array.
json-schema-to-zodConverts JSON schema objects or files into Zod schemas
@scalar/validationA lightweight, schema-first validation library for Scalar
json-schema-merge-allofSimplify your schema by combining allOf into the root schema, safely.
is-my-json-validA [JSONSchema](https://json-schema.org/) validator that uses code generation to be extremely fast.
@mastra/schema-compatTool schema compatibility layer for Mastra.ai
@json-render/coreJSON becomes real things. Define your catalog, register your components, let AI generate.
express-validatorExpress middleware for the validator module.
zod-openapiConvert Zod Schemas to OpenAPI v3.x documentation
swagger-parserSwagger 2.0 and OpenAPI 3.0 parser and validator for Node and browsers
hono-openapiOpenAPI schema generator for Hono
json-schema-ref-parserParse, Resolve, and Dereference JSON Schema $ref pointers
parse-semverParse, normalize and validate given semver shorthand (e.g. gulp@v3.8.10) to object.
airbnb-prop-typesCustom React PropType validators that we use at Airbnb.
tcomb-validationGeneral purpose validation library for JavaScript
convictFeatureful configuration management library for Node.js (nested structure, schema validation, etc.)
@metamask/superstructA simple and composable way to validate data in JavaScript (and TypeScript).
@scalar/typeboxJson Schema Type Builder with Static Type Resolution for TypeScript
exact-mirrorMirror exact value to TypeBox/OpenAPI model
is-base64Predicate that returns true if base64 string.
fastify-type-provider-zodZod Type Provider for Fastify@5
graphql-query-complexityValidation rule for GraphQL query complexity analysis
@readme/openapi-parserSwagger 2.0 and OpenAPI 3.x parser and validator for Node and browsers
validate.jsDeclarative validations for JavaScript
v8nDead simple fluent JavaScript validation library
revalidatorA cross-browser / node.js validator powered by JSON Schema
ts-json-schema-generatorGenerate JSON schema from your Typescript sources
untruncate-jsonFix up the end of a partial JSON string to create valid JSON.
@readme/openapi-schemasJSON Schemas for every version of the OpenAPI Specification
@swaggerexpert/cookieRFC 6265 compliant cookie parser, validator and serializer.
@inversifyjs/prototype-utilsPrototype related utils
json-schema-to-typescript-liteLite version of json-schema-to-typescript
npm-user-validateUser validations for npm

Sources: npm registry, npm downloads API, GitHub API, Bundlephobia

Packages compared

What each package is

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