Who is Web Component DevTools for?

Web Component DevTools is an open-source project built for Web Component developers.

Does Web Component DevTools have a free plan?

Yes — Web Component DevTools is open source under the Open Source license and free to use.

What platforms does Web Component DevTools run on?

Web Component DevTools runs on the web and embeddable surfaces.

Is Web Component DevTools still maintained?

Unverified. Web Component DevTools has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Web Component DevTools?

Similar projects tracked by PulseGate include DevTools, Svelte Devtools, and Three.js Developer Tools.

Who makes Web Component DevTools?

Web Component DevTools is developed by Matsuuu.

When did Web Component DevTools launch?

Web Component DevTools first shipped in 2021.

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Web Component DevTools

Name: Web Component DevTools
Author: Matsuuu

github.comBrowser DevTools & extensions

Web Component DevTools is an open-source browser extension that enhances development workflows for Web Components. It provides browser-based inspection and debugging capabilities for developers building custom elements and related web interfaces.

Open SourceWebEmbeddable

Visit github.com

Overview

4 features

Web Component DevTools is a Browser DevTools & extensions project. It focuses on inspecting and debugging Web Components in the browser without specialized development tools. Web Component DevTools is an open-source project aimed at Web Component developers. The project is open source (Open Source). Web Component DevTools is available on the web and embeddable surfaces.

It is developed by Matsuuu, and it first shipped in 2021. Among its 4 catalogued features are component inspection, browser debugging, and custom element support.

Summary written by a language model from the project’s public pages.

Component inspection
Browser debugging
Custom element support
Firefox extension

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed9 Sept · 01:50 UTC
Web Component DevTools verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Web Component DevTools

What is Web Component DevTools?: Web Component DevTools focuses on inspecting and debugging Web Components in the browser without specialized development tools. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Web Component DevTools for?: Web Component DevTools is an open-source project built for Web Component developers.
Does Web Component DevTools have a free plan?: Yes — Web Component DevTools is open source under the Open Source license and free to use.
What platforms does Web Component DevTools run on?: Web Component DevTools runs on the web and embeddable surfaces.
Is Web Component DevTools still maintained?: Unverified. Web Component DevTools has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Web Component DevTools?: Similar projects tracked by PulseGate include DevTools, Svelte Devtools, and Three.js Developer Tools.DevTools Svelte Devtools Three.js Developer Tools
Who makes Web Component DevTools?: Web Component DevTools is developed by Matsuuu.
When did Web Component DevTools launch?: Web Component DevTools first shipped in 2021.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 9 Sept 2026
Built for: Web Component developers
Model: Open source
Solves: Inspecting and debugging Web Components in the browser without specialized development tools.

Registered as

Firefox Add-ons: web-component-devtools

Developer

Matsuuu

Index record

Indexed: 9 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 9 Sept 2026

Identity audit (13)

Slug: web-component-devtools-github-com
Lifecycle state recorded: 9 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 9 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 9 Sept 2026
Canonical URL: https://github.com/Matsuuu/web-component-devtools

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