v1.0.0 — Now available on npm

Form validation for the modern web

A zero-dependency form validation ecosystem. Framework agnostic, type-safe, and built for performance.

$npm install ctrovalidate-browser▌

Everything you need, nothing you don't

A complete validation toolkit designed for real-world applications.

Works with vanilla JS, React, Vue, Svelte, and Next.js out of the box.

Define validation rules as plain JSON objects — no complex DSLs.

Full TypeScript support with inferred types from your schemas.

Run the same validation logic on the client and server seamlessly.

Core is under 5KB gzipped. No dependencies, zero bloat.

Comprehensive built-in rules covering strings, numbers, dates, and more.

Atomic Rules

JSON

Schema Definition

<5KB

Core Gzipped

100%

Test Coverage

Pick the packages you need — use them together or standalone.

Install in seconds and start validating with a clean, declarative API.