filter-validate-email

FILTER_VALIDATE_EMAIL.js

Email validation compatible with PHP's filter_var($value, FILTER_VALIDATE_EMAIL)

v2 ships as a single ES module. Breaking changes from v1:

• ESM package — there is no separate CommonJS build. import works everywhere; require() works on Node.js >= 22.12 via native require(ESM).
• Node.js >= 22 required.
• Only the package root is exported; deep imports (e.g. filter-validate-email/es/...) are no longer available.
• In the browser, load it as an ES module from a CDN (<script type="module">, see below); there is no bundled browser global / UMD / IIFE build.

If you need a real CommonJS build, a browser global, or older runtimes, stay on v1.

Installing

NPM

npm install filter-validate-email

CDN

Load it as an ES module from any npm CDN:

<script type="module">
  import validateEmail from 'https://esm.sh/filter-validate-email';

  validateEmail('...'); // true / false
</script>

jsDelivr (https://cdn.jsdelivr.net/npm/filter-validate-email/+esm) and unpkg (https://unpkg.com/filter-validate-email?module) work too.

It is strongly recommended that you pin a fixed version, e.g. https://esm.sh/filter-validate-email@2.0.0.

Usage

Validate Unicode Email (default)

PHP

<?php

$value = '...';
$result = (bool)filter_var($value, FILTER_VALIDATE_EMAIL, FILTER_FLAG_EMAIL_UNICODE);

JavaScript

import validateEmail from 'filter-validate-email';

const value = '...';
const result = validateEmail(value);

Validate Ascii Email

PHP

<?php

$value = '...';
$result = (bool)filter_var($value, FILTER_VALIDATE_EMAIL);

JavaScript

import validateEmail from 'filter-validate-email';

const value = '...';
const result = validateEmail(value, false);

Appendix

• Pure HTML Version: mpyw/FILTER_VALIDATE_EMAIL.html