# validatorjs/validator.js

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23,756 stars · 2,431 forks · JavaScript · mit

## Links

- GitHub: https://github.com/validatorjs/validator.js
- awesome-repositories: https://awesome-repositories.com/repository/validatorjs-validator-js.md

## Topics

`hacktoberfest` `input` `javascript` `node` `sanitization` `sanitize` `validate` `validation` `validations` `validator`

## Description

Validator.js is a library of pure, stateless functions designed for the validation and sanitization of string data within any JavaScript environment. It provides a modular suite of tools to verify that user-provided information conforms to specific formats, such as emails, URLs, and dates, while simultaneously cleaning untrusted input to mitigate security risks.

The library distinguishes itself through a design that avoids platform-specific APIs, ensuring consistent execution across browsers, servers, and edge runtimes. By utilizing a pre-compiled regular expression engine and a pure data transformation pipeline, it maintains predictable performance and side-effect-free processing for all string analysis tasks.

The project covers a broad range of data integrity requirements, including the normalization of web form submissions and the enforcement of constraints for incoming API requests. These utilities assist in preventing injection attacks and cross-site scripting by filtering and escaping dangerous characters before data is processed or rendered.

## Tags

### Software Engineering & Architecture

- [String Validation and Normalization](https://awesome-repositories.com/f/software-engineering-architecture/string-validation-and-normalization.md) — Provides a collection of pure functions for verifying and sanitizing string data to ensure input integrity.
- [Data Transformation Pipelines](https://awesome-repositories.com/f/software-engineering-architecture/data-transformation-pipelines.md) — Processes input strings through a pure, side-effect-free pipeline for consistent sanitization and validation.
- [Stateless Functional Components](https://awesome-repositories.com/f/software-engineering-architecture/architectural-design-patterns/design-patterns/functional-design-patterns/stateless-functional-components.md) — Utilizes stateless functional composition to ensure predictable data processing and easy integration.
- [Modular Software Design](https://awesome-repositories.com/f/software-engineering-architecture/modular-software-design.md) — Implements a modular, environment-agnostic architecture that functions consistently across browsers, servers, and edge runtimes.

### Security & Cryptography

- [Data Sanitization Utilities](https://awesome-repositories.com/f/security-cryptography/data-sanitization-utilities.md) — Provides a comprehensive set of tools for cleaning and escaping untrusted input strings. ([source](https://cdn.jsdelivr.net/gh/validatorjs/validator.js@master/README.md))
- [Cross-Site Scripting Prevention](https://awesome-repositories.com/f/security-cryptography/cross-site-scripting-prevention.md) — Filters and escapes untrusted input to prevent cross-site scripting and injection attacks.

### User Interface & Experience

- [Input Validation Utilities](https://awesome-repositories.com/f/user-interface-experience/input-validation-utilities.md) — Offers a modular suite of stateless functions for validating data formats like emails, URLs, and dates.
- [Input Validation Rules](https://awesome-repositories.com/f/user-interface-experience/form-and-input-management/form-validation/input-validation-rules.md) — Provides a suite of declarative functions for validating string formats and data integrity.
- [JavaScript Validators](https://awesome-repositories.com/f/user-interface-experience/form-and-input-management/form-validation/input-validation-rules/javascript-validators.md) — Verifies that user-provided string data conforms to business rules within any JavaScript environment.

### Data & Databases

- [Data Validation](https://awesome-repositories.com/f/data-databases/data-governance-modeling/data-management-governance/data-integrity-validation/data-validation.md) — Verifies that incoming information meets specific format and content requirements to maintain data integrity. ([source](https://cdn.jsdelivr.net/gh/validatorjs/validator.js@master/README.md))

### Web Development

- [Request Validation](https://awesome-repositories.com/f/web-development/request-validation.md) — Enforces data constraints on incoming request payloads to ensure they meet business rules.
- [Request Integrity Verification](https://awesome-repositories.com/f/web-development/api-management-tools/api-request-handling/request-integrity-verification.md) — Ensures incoming API request data matches expected formats and constraints before processing.
- [Validated Web Forms](https://awesome-repositories.com/f/web-development/form-handling/validated-web-forms.md) — Normalizes and cleans text submitted through web forms to prevent malicious code injection.

### Part of an Awesome List

- [Data Utilities and Libraries](https://awesome-repositories.com/f/awesome-lists/data/data-utilities-and-libraries.md) — Library for string validation.
- [Data Validation](https://awesome-repositories.com/f/awesome-lists/devtools/data-validation.md) — Library for string validation.