ArkType
A runtime validator with TypeScript-like schema syntax.
What it does
A runtime validator with TypeScript-like schema syntax.
When it fits
Validating external data while keeping schema definitions close to static types.
Other options in this category
- io-ts — Validating data at application boundaries in functional TypeScript code.
- Joi — Checking structured request payloads and configuration objects.
- Superstruct — Checking application input with small reusable data structures.
- T3 Env — Failing early when server or client configuration is missing or invalid.
- Yup — Defining form constraints and reusable object validation rules.
Source
Editorial overview reviewed on October 24, 2026. Follow the source for current setup, compatibility, and licensing.