Fix misspelled email addresses in JavaScript
📮 An ultratiny (1.9 KB) and fast JavaScript email checker to reduce users typing a wrong email. Written in TypeScript. Enterprise-grade.
96,000+ weekly downloads
Get started in 2 minutes!
1
Install @zootools/email-spell-checker
npm i @zootools/email-spell-checker --save2
Import and call run method to validate your email
import emailSpellChecker from '@zootools/email-spell-checker';
const suggestion = emailSpellChecker.run({
email: 'jorge@gmaik.co'
})
3
If the user made a typo, suggestion contain the fixed email. 🎉
if (suggestion) {
// dev: user made a typo -- handle the suggestion.
// for example: show a message to fix the email.
console.log(suggestion.address); // jorge
console.log(suggestion.domain); // gmail.com
console.log(suggestion.full); // jorge@gmail.com
}
First-class developer experience you deserve
🔥 96k+ weekly downloads
Top companies and brands use it every day in demanding production products.
⚡️ Lightning fast
Highly performant email checking using Sift3 - a fast and accurate string distance algorithm.
🔨 1-minute migration
Same API and functions as mailcheck so you can switch in a sec!
🔋 Updated
39+ popular domains, and 66+ modern TLDs out-of-the-box. Frequently updated.
🚀 Ridiculously small
1.9KB (minzip) and 0 external dependencies. We agree, big bundles suck!
💙 Written in TypeScript
Fully written in TypeScript, cause we know you love it and we too.
⚙️ Extensible
Allows you to pass your custom rules and domains. Tweak it as you need.
🔐 Unit tested
Cause we'd never use a library without tests :).
Frequently asked questions
Does the checker send my users' emails anywhere?
No. The library runs entirely in the browser and makes zero network requests. Addresses are compared against a local dictionary of popular domains and TLDs, so nothing is ever transmitted or stored.
Is this the same as email verification?
Not quite — it's complementary. The spell checker fixes obvious typos at the point of entry (like gmaik.co → gmail.com). To confirm an address is real, deliverable, and not disposable, use SMASHSEND's Email Verification add-on, which checks MX records, mailbox existence, and known spam-trap domains.
Can I customize the suggestions?
Yes. Pass your own domains, topLevelDomains, threshold values, or even a custom distance function to run() to tune it for your specific audience.
How much does it cost?
The library is free and open source (MIT). It's built and maintained by the team behind SMASHSEND — the email platform that helps you turn every clean signup into a customer.
Got questions?
Watch this quick tutorial or contact us
Great emails start with a clean list
Catch typos on the way in, then send campaigns, automations, and transactional email that actually land — all from one platform.
Free tool • Zero dependencies • Open source • Built by SMASHSEND