icebob/fastest-validator

Health v2 · maintenance only

Adoption not part of the score

1463 stars · 100 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A schema-based data validation library for JavaScript with 24 built-in validators, sanitization, and custom validator support. It compiles schemas into checker functions to achieve extremely high validation throughput.

Use cases

• validate request payloads in a NodeJS API
• validate nested objects and arrays against a schema
• sanitize and coerce user input before processing
• validate data in the browser or Deno
• replace Joi with a faster validation library
• define custom validators and reusable schema aliases
• return structured, customizable validation error messages

When to choose

• validation throughput is critical (millions of checks per second)
• you want schema-based validation with zero dependencies
• you need nested object/array validation with sanitization
• you need the same validator across NodeJS, browser, and Deno

When to avoid

• you prefer declarative validation with rich plugin ecosystems like Joi or Zod
• you need TypeScript-first type inference from schemas
• you are uncomfortable with Function-constructor code generation

Facets

library · maturity stable

testing developer-tools web-development backend developer-tools apis browser schema-validation validation data-validation sanitization performance zero-dependencies nodejs deno javascript

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