valibot

v1.0.0-beta.3MITTree-shakeableTS Ready

The modular and type-safe schema library for validating structural data with up to 98% smaller bundle footprint.

97/ 100

Excellent Health

Weekly Downloads

1.9M

Bundle Size (gzip)

1.4 kB(3.9 kB min)

Dependencies

Zero Deps

Last Updated

2025-02-20

SPONSORED CLOUD & DEV TOOLS•Google Ads Partner

NPMBot AI Assessment

The tree-shakeable future of schema validation, built specifically for client bundles.

Valibot was built to solve Zod's bundle size problem. By utilizing functional composition (`v.pipe(v.string(), v.email())`), bundlers can tree-shake every unused validator. A simple schema often weighs under 1kB gzipped.

Key Advantages

•Granular tree-shaking: typical schemas add less than 1.5kB to client bundles
•Blazing-fast parsing speed matching or exceeding Zod
•Standard Schema specification compliant (interoperable across tools)
•Zero dependencies

Gotchas & Limitations

•Slightly more verbose functional syntax compared to Zod method chaining
•Smaller third-party plugin ecosystem than Zod

Recommended For:

Client-side form validation where bundle size is strictly audited, Micro-frontends and Edge environments

Avoid If:

Teams already standardized on extensive Zod-specific extensions

FEATURED PARTNER•Google Ads Partner

Installation & Quickstart

Package Manager Command

javascript

npm install valibot

valibot Usage Example

javascript

import * as v from 'valibot';

const UserSchema = v.object({
  name: v.pipe(v.string(), v.minLength(2)),
  email: v.pipe(v.string(), v.email())
});

type User = v.InferOutput<typeof UserSchema>;

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Repository & Links

NPM Official Registry Official Documentation GitHub Repository