Making your own GTM templates (and why it's kind of a big deal)
Original: Custom Templates Guide For Google Tag Manager
May 26, 2025
92 min read
Guide
Advanced
Summary
Simo Ahava’s long-form guide to building, securing, and unit-testing GTM Custom Templates.
Who This Is For
Analytics Engineers
Technical Marketers
Developers
Key Takeaways
- Create reusable tag, variable, and client templates using GTM's sandboxed JavaScript environment
- Configure template permissions and policies to ensure safe code execution in enterprise environments
- Build custom tracking solutions for vendors not natively supported by GTM
- Share templates across containers and teams using export/import functionality and the Community gallery
- Navigate the Template Editor to design user interfaces and manage template code
Tools & Technologies
Google Tag Manager Template Editor Sandboxed JavaScript Community Gallery GTM Preview Mode Server-side tagging
Topics Covered
tag-management google-tag-manager custom-templates
Ready to dive deeper?
Read Full Article on www.simoahava.com
