TMDL View on the Web (Preview): Code-First Semantic Modelling Now in Your Browser

TMDL View on the Web Is Almost Here — And It Changes Everything for Semantic Modelling

If you work with Power BI semantic models, you already know how powerful Tabular Model Definition Language (TMDL) can be — but until now, leveraging it meant being tied to desktop tooling. That's about to change in a big way. Microsoft is rolling out TMDL View on the Web (Preview) in the coming weeks, bringing a full code-first semantic modelling experience directly to your browser — no installation required.

What Is TMDL View on the Web?

TMDL View on the Web delivers a powerful, code-first interface for working with Power BI semantic models directly within the browser-based Power BI service. This means developers, data modellers, and BI professionals can inspect, author, and manage semantic model definitions without ever leaving their web environment.

Key Benefits of TMDL View on the Web

• Browser-native experience: No need to switch to Power BI Desktop or external tools — work directly in the Power BI web service.
• Code-first semantic modelling: Gain granular control over your model definitions using TMDL syntax.
• Improved collaboration: Easily review, audit, and share model definitions across teams without friction.
• Streamlined development workflows: Reduce the gap between development and deployment environments, accelerating your delivery pipeline.
• DevOps and CI/CD alignment: Supports modern analytics engineering practices by making model definitions more portable and version-control friendly.

Why This Matters for Power BI and Microsoft Fabric Users

As Microsoft continues to evolve the Power Platform and Microsoft Fabric ecosystem, TMDL has become an increasingly important standard for defining and versioning semantic models. Making TMDL accessible directly via the browser is a significant step toward a more open, developer-friendly BI environment — one that aligns naturally with modern DevOps and CI/CD practices for analytics.

For organisations already investing in data-driven transformation or looking to mature their Power BI governance strategy, this feature preview is well worth exploring early. Getting familiar with it now means you'll be ahead of the curve when it reaches general availability.

How to Get Started with TMDL View on the Web

Keep an eye on your Power BI service tenant over the coming weeks as this preview gradually rolls out. We recommend testing TMDL View on the Web in a development or non-production environment first to understand how it fits into your existing semantic model workflows before adopting it at scale.

Consider using the preview as an opportunity to:

• Audit and document existing semantic models more efficiently.
• Onboard team members to code-first modelling practices.
• Evaluate how TMDL fits into your broader Power Platform development and governance processes.

Not sure how to make the most of Power BI's rapidly evolving feature set? Our team at CRMONCE can help. Whether you need hands-on Power Platform development support, strategic consulting, or Power BI training for your team, we're here to guide you every step of the way.

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Our Power Platform specialists help organisations design, build, and govern world-class semantic models and BI solutions. Let's talk about what's possible for your business.

Source: This article is curated from the official Power BI Blog. Visit the original post for full details and official documentation.