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Preview of Blazor Developer Tools

Blazor Developer Tools by joegregorydev

Developer tools for debugging Blazor applications

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About this extension
Blazor Dev Tools Firefox exists thanks to Cameron Keene

The first visual DevTools for Blazor. See your component tree, profile renders, understand why components re-render. No more console.log debugging.
NEW IN v1.0.0 - Complete rewrite with Timeline Profiler, Flamegraph visualization, and "Why Did This Render?" feature.
FEATURES

Component Tree - Visualize your entire Blazor component hierarchy
Timeline Profiler - Record and analyze component renders over time
Flamegraph View - Visual swimlane timeline with zoom and pan
"Why Did This Render?" - See exactly what triggered each render
Ranked View - Find your slowest components at a glance
Element Picker - Click any element to identify its Blazor component
File Path Display - See which .razor file each component comes from
Works With Any Component - No code changes required for basic tracking
Enhanced Metrics - Opt-in for deep lifecycle timing

INSTALLATION
You need 2 components:

This browser extension
The NuGet package: BlazorDeveloperTools

dotnet add package BlazorDeveloperTools
USAGE

Run your Blazor app
Open DevTools (F12)
Navigate to the "Blazor" tab
Explore Components or record a Timeline profile

TIMELINE PROFILER

Click Record, interact with your app, click Stop
Switch between Events, Ranked, and Flamegraph views
Click any event to see why it rendered

For documentation and live demo: www.blazordevelopertools.com
GitHub: github.com/joe-gregory/blazor-devtools
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Permissions and data

Required permissions:

  • Extend developer tools to access your data in open tabs
  • Access browser tabs
  • Access your data for all web sites

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Add-on Links
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Version
1.0.0.2
Size
98.02 kB
Last updated
17 days ago (10 Mar 2026)
Related Categories
  • Web Development
Licence
Apache Licence 2.0
Version History
  • See all versions
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