A command line tool that takes a URL or a file, then uses html-validator (a wrapper for https://validator.w3.org/nu/) to validate each page.
Ajv class for JSON Schema draft-04
Another JSON Schema Validator
Validate identifier/keywords name
Validate plugin/preset options
Sanity template validator for remote templates
Additional JSON-Schema keywords for Ajv JSON validator
Amazon States Language validator
Tools to validate package.json files.
Command line interface for Ajv JSON schema validator
Decorator-based property validation for classes.
String validation and sanitization
Another JSON Schema Validator
Express middleware for the validator module.
Object schema validation
Custom error messages in JSON Schemas for Ajv validator
Find broken links, missing images, etc in your HTML. Scurry around your site and find all those broken links.
Validate form asynchronous
TypeScript's 1:1 validator, optimized from editor to runtime
validate form asynchronous
Parser/validator for OpenAPI 3.x definitions
TypeScript definitions for validator
Gatsby command-line interface for creating new sites and running Gatsby commands
Format validation for Ajv v7+