The most cost-effective email verification service

Get rid of email bounces and reach more customers with our proven high-quality yet affordable email verification and email list cleaning solutions that improve your ROI.

Trusted and rated ✮✮✮✮✮ 4.8/5 based on 200+ reviews.

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Email Verification Dashboard

The Highest Rated Email Checker

TheChecker is the #1 email validation tool based on independent reviews.










Get full control of your email list with real-time validation

Don't let misspelled and invalid email addresses ruin your list quality and your sender reputation. Add our real-time email validation tool to any form on your website by just copying and pasting one line of code. It takes only a few seconds and requires no technical skills.

Install to verify email address online
Our integrations simply make data transfer easier

Integrate TheChecker with your favorite platforms

TheChecker works with every email platform. It comes with powerful integrations that fit into your existing workflow. Import and export your lists with ease and consistently keep them clean.

Explore all integrations

Verify & clean your database without losing conversions

If only 10% of the emails are invalid, less than 44% will be delivered. Don't let them ruin your inbox deliverability and your campaigns ROI.

Use our online bulk email checker to clean your current database by simply uploading a TXT, CSV, XLS, or XLSX file. It's quick and easy!

Verify email list now
User-friendly email verification dashboard
Email Validation API built for developers

Email validation API built for developers

Use our API to run bulk or single email validation straight on your web and mobile application or develop a white-label version of our web app.

See API docs

Why People Trust TheChecker

Based on the last 100 million emails we verified in 2018, 23,51% would bounce.
We make sure you reach your customers.

Protect Sender Reputation

1 out of 5 emails is not delivered due to problems related to IP and domains. We run a thorough email list cleaning to remove them and protect your sender reputation.

Avoid ESPs Blockages

A tiny ~5% bounce rate can get you blocked by the ESPs. Our single and bulk email list cleaning tool gets you protected to improve inbox deliverability and reduce bounce rate.

Increase Campaigns ROI

Our innovative A.I. powered email checker promotes superior deliverability (up to 99.9%) to the inbox, converts more sales, and increases your campaigns ROI.

Our Email Verification Service Includes

Databases naturally degrade by about 22.5% every year. A 5% bounce rate can get you blocked. You don't have to worry about that when using TheChecker.

Up to 99%+ Accuracy

Guaranteed accuracy: Up to 99% to improve overall inbox delivery metrics. One of the highest in the verification industry.

Fast Verification

TheChecker is able to clean up massive, outdated contact lists in a fairly short amount of time with complete accuracy.

Affordable Prices

We offer you (by far) the most cost-effective solution you can find online. Our software is accurate, fast and affordable.

Filetypes Compatibility

We offer a wide file type compatibility. Upload CSV, TXT, XLS or XLSX files and get your database verified within minutes.

Bounce Checker

Our tool identifies and tells you which emails will bounce and thus are not safe to send. Keep your bounce rate under control with TheChecker!


TheChecker has the latest anti-greylisting technology and offers you the most accurate email validation results.

Catch-all Checker

Checks for domains that are catch-all, which return valid for all addresses. This feature helps you maintain a high quality database.

Typo Correction

Our tool will suggest the possible modification for misspelled contacts. We won't allow typos to influence your list quality.

Syntax Validation

TheCheckar can clean your database from addresses with syntax errors. Therefore you don`t have to do it manually.

Domain Validation

Our software can sucessfully mark all of the emails containing inactive or invalid domains that are known for spam and abuse.

Mailbox Checker

TheChecker notifies you if an MX Record is found for the domain being checked. This way, you end up with genuine records.

Risk Validation

Our email validation API is your first line of defense against high-risk recipients. We check for role-based addresses.

Free De-duplication

TheCheckers also comes with a de-duplication feature. It removes all records containing duplicate contacts in your list.

Spam Trap Remover

Spam traps don’t apply to real people and having them in your list will tarnish your sender reputation and also get you blacklisted.

Disposables Checker

Checks against our frequently updated temporary email database.

Pay Only For Results

If we can't verify a certain email at any moment, we refund you the credits.

Join the Smartest

Register today and get 100 validations for FREE! See the accurate results yourself!