Email verification widget

Discover our free email verification widget: seamlessly integrated with any web form, it validates email addresses in real-time at the point of capture, keeping bad email addresses off your list and eliminating bounced emails.

Real-time Email Verification

Harnessing the lightning-fast Verifalia email verification engine, our JavaScript widget offers real-time email address validation: seamlessly integrated into any web page, it actively checks email addresses as users type, ensuring that only valid and deliverable email addresses are accepted before form submissions are made.
Our embeddable JavaScript email checker in action

Easy Setup and Customization

Get up and running with our widget in no time with our simple installation process: by copying and pasting just a few lines of HTML code, you can seamlessly integrate our widget into your web page and customize it according to your needs.

Compatible with Any Technology

Experience the seamless integration of our JavaScript widget, designed to effortlessly complement any technology stack: our widget is fully compatible with native HTML form validation, ensuring a smooth transition for your existing validation processes.
Our widget also supports popular front-end form validation libraries and frameworks, including Adobe Marketo Engage, FormSite, FormStack, FormValidation, HubSpot, Instapage, jQuery Validation Plugin, Kendo UI for jQuery, KickoffLabs, Leadpages, Pardot, Parsley, Unbounce, Validate.js, Zoho Sites and others, adapting in an unobtrusive manner and harmonizing its visual feedback with your page's existing design.

No Technical Skills Required

Unlock the power of email verification without the need for advanced coding skills! Our JavaScript widget offers a user-friendly solution that requires minimal effort to implement.

Universal Language Support

Our widget breaks down language barriers by offering support for email address verification in any alphabet. From English to Chinese, Cyrillic to Arabic, and beyond, our widget can handle them all, including non-ASCII Unicode glyphs.
No matter the language or script, our widget effortlessly adapts to the unique characteristics of each alphabet, ensuring accurate email verification across diverse linguistic contexts. With its intelligent detection capabilities, the widget automatically identifies the directionality of your page and adjusts its visual feedback accordingly, seamlessly integrating with the overall design.

Lightweight and Zero-Dependencies

Experience lightning-fast performance and a streamlined integration process with our widget, meticulously crafted to be lightweight and independent. Composed of a single JavaScript file of less than 10KB, our widget ensures an instant loading experience on any web page.
Say goodbye to external dependencies and enjoy the simplicity of our widget. It operates seamlessly without the need for additional frameworks or libraries such as jQuery, React, Vue, or any other third-party components. We've designed it to be self-contained, ensuring a hassle-free integration process.

Tailored to Your Preferences

Experience full control over the behavior and appearance of our widget, thanks to its comprehensive configuration mechanism. Fine-grained customization options empower you to match your preferences and align with your unique business logic seamlessly.
With our widget, you can easily modify CSS classes to ensure a visually cohesive integration with your website's design; tailor its behavior by effortlessly adjusting the DOM events it handles, allowing for a personalized user experience that aligns perfectly with your desired functionality.

Anti-Bot Detection / CAPTCHA

Our widget can be optionally connected to the most popular CAPTCHA services to stop bot submissions and verify that emails come from real people, not bots; this integration is fully configurable and doesn't require any coding skills.
We support Cloudflare Turnstile, hCaptcha, and Google reCAPTCHA v2 (both invisible and checkbox), as well as v3. This prevents bots from utilizing Verifalia credits or imposing throttling limitations on genuine users; additionally, you can deploy multiple instances of our widget on a single HTML page, each configured with a different CAPTCHA service or settings.

and use our JavaScript widget on your website today.

Why choose Verifalia?

Verifalia has been in the business of email validation since 2005 and we have helped thousands of satisfied customers clean up their mailing lists, decrease their bounce rate and increase the productivity of their email marketing efforts.

In addition to experience, here are some of the things that separate us from the competition:

Levels of service

Only Verifalia offers three levels of verification services, so pick the one that is right for your job.

Our High level validation is thorough enough for most needs. But our premium services are unique in the industry, for those who demand the best - they work harder and longer to get you more definitive results.

Data security

The security of your valuable data is our #1 concern. Your data is protected every step of the process with encrypted uploads, password protection, secure servers and continuous system monitoring.

Client areas of the site are secured by HTTPS protocol and all data is automatically deleted from our system after each validation according to your data retention preferences (minimum 5 minutes, maximum 30 days), or you can delete it manually anytime: your data is never at risk.


Your email validation takes place from our servers, so you are never at risk of being blacklisted by your clients.

Also, due to our extensive history our servers are known and have a great reputation, which allows us to offer you the most accurate results in the industry.

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