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How to Integrate OptinMonster with Google Tag Manager

How to Integrate OptinMonster with Google Tag Manager

To do this, add ?om-verify-site=true to the end of the URL to a specific page containing our embed code and you should see a green “Verified” badge appear for a moment in the lower left-hand corner of the browser window.

For example: https://optinmonster.com?om-verify-site=true

Your site should then show as “Connected”.

Why is my campaign not showing in Safari’s private browsing mode?

If your campaign is not showing in Safari’s private browsing mode and your site has the OptinMonster embed code loaded via Google Tag Manager (GTM), it is likely due to Apple’s new Advanced Tracking and Fingerprinting Protection, which is enabled by default in Safari’s private browsing mode on iOS 17.

This protection appears to block Google Tag Manager, preventing the OptinMonster embed script from loading and causing campaigns to fail to display. You can Reduce Protections in a private browsing tab, and your OptinMonster campaigns should appear as Google Tag Manager is unblocked.

To avoid this issue, we recommend adding your OptinMonster global embed code directly to your site. This approach bypasses Safari’s privacy restrictions entirely and ensures campaigns will load, even when the default protections are enabled.


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OptinMonster has transformed our business. Before integrating their optins, our clients saw a 2% conversion rate from web traffic, which is slightly above the standard for their industry. With the integration of OptinMonster’s lightbox popup, exit-intent technology, split testing, and other tools, our client’s conversion rates soared by an unprecedented 500%. They attracted substantially more customers while spending less on digital advertising. Their success propelled them to the top of their markets, outperforming national chains and other medical spas with much bigger marketing budgets. Our client’s success in their market has distinguished us in our own. We are now one of the most sought-after marketing firms in the industry of aesthetic medicine. We know that the integration of OptinMonster, more than any other tool or marketing strategy, has supported this growth and achievement.

chris zelig medstar media

Chris Zelig

Partner, Medstar Media

OptinMonster has been a game-changer for us. From driving donations to collecting new leads, there is nothing that this simple tool has failed to accomplish. Our lead collection rate has jumped by over 1,000%.

joe lowe american bird conservancy

Joe Lowe

Director of Digital Communications, American Bird Conservancy

Through OptinMonster’s exit-intent popups, we have more than doubled our sales conversion rate. Best of all is the compound effect of using OptinMonster over a long period of time—more conversions mean more customers, which means more word of mouth.

mitch smith, managing director, shockbyte

Mitch Smith

Managing Director, Shockbyte.com