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 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
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 verifier to clean your current database by simply uploading a TXT, CSV, XLS, or XLSX file. It's quick and easy!Verify email list now
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.
What Our Customers Say?
Don't take our word for it. Here's what our customers think.
We made the switch to TheChecker in 2017 - we needed to ensure our clients marketing campaigns achieved the highest deliverability rates. Having used many services with varying results, we have found TheChecker to be the best - fast, accurate and easy to use.
Good and practical tool. Easy to use API, great web form widget and simple user interface make this tool a great find - and it's really well priced too!
Here at LeadLovers we are always looking for smart tools that help us to improve our email deliverability even more. By integrating TheChecker in the lead acquisition flow we got amazing results in the prevention of sending reputation issues.
The best! It's easy to use, the results are great. All works perfect. We reduce all our marketing complaints and fake registers.
Using TheChecker has been the most efficient and user-friendly process for our company to validate or go on email marketing campaigns. There has been no need to use any other site since!
I didn't know how many leads I missed due to bad invalid lists and sending reputation problems. TheChecker has made it very quick and easy to dramatically improve the quality of the campaigns and to generate new sales opportunities through email. I strongly recommend it!
Our Validation 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.
TheChecker is able to clean up massive, outdated contact lists in a fairly short amount of time with complete accuracy.
We offer you (by far) the most cost-effective solution you can find online. Our software is accurate, fast and affordable.
We offer a wide file type compatibility. Upload CSV, TXT, XLS or XLSX files and get your database verified within minutes.
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.
Checks for domains that are catch-all, which return valid for all addresses. This feature helps you maintain a high quality database.
Our tool will suggest the possible modification for misspelled contacts. We won't allow typos to influence your list quality.
TheCheckar can clean your database from addresses with syntax errors. Therefore you don`t have to do it manually.
Our software can sucessfully mark all of the emails containing inactive or invalid domains that are known for spam and abuse.
TheChecker notifies you if an MX Record is found for the domain being checked. This way, you end up with genuine records.
Our email validation API is your first line of defense against high-risk recipients. We check for role-based addresses.
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.
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!