What does Meta tags inspector do?

Meta tags inspector focuses on inspecting webpage meta tags and metadata during browser development. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is Meta tags inspector for?

Meta tags inspector is an open-source project built for firefox extension developers and web developers.

Is Meta tags inspector free?

Yes — Meta tags inspector is open source under the Open Source license and free to use.

What platforms does Meta tags inspector run on?

Meta tags inspector runs on the web and embeddable surfaces. It can also be self-hosted.

Is Meta tags inspector still active?

Unverified. Meta tags inspector 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 Meta tags inspector?

Similar projects tracked by PulseGate include SEO Tag Inspector, Meta Dock, and Inspector DOM Sidebar.

Who develops Meta tags inspector?

Meta tags inspector is developed by MDN Web Docs.

When did Meta tags inspector launch?

Meta tags inspector first shipped in 2021.

Back to the index

Meta tags inspector

Name: Meta tags inspector
Author: MDN Web Docs

github.comInfrastructure

Meta tags inspector is an open-source Firefox WebExtension example that adds a DevTools panel for inspecting webpage metadata. It is intended for developers learning or building browser extensions with the WebExtensions API.

Open SourceWebEmbeddableSelf-hosted

Visit github.com

Overview

5 features

Meta tags inspector is a Browser DevTools & extensions project. It focuses on inspecting webpage meta tags and metadata during browser development. Meta tags inspector is an open-source project aimed at firefox extension developers and web developers. The project is open source (Open Source). It ships for the web and embeddable surfaces, and it can be self-hosted.

MDN Web Docs builds and maintains Meta tags inspector, and it first shipped in 2021. Among its 5 catalogued features are devTools panel, meta tag inspection, and firefox extension.

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

DevTools panel
Meta tag inspection
Firefox extension
WebExtensions API
Browser debugging

Built with & integrations

Runs on

BrowserEmbeddableSelf-hosted

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sept · 09:39 UTC
Meta tags inspector verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Meta tags inspector

What does Meta tags inspector do?: Meta tags inspector focuses on inspecting webpage meta tags and metadata during browser development. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Meta tags inspector for?: Meta tags inspector is an open-source project built for firefox extension developers and web developers.
Is Meta tags inspector free?: Yes — Meta tags inspector is open source under the Open Source license and free to use.
What platforms does Meta tags inspector run on?: Meta tags inspector runs on the web and embeddable surfaces. It can also be self-hosted.
Is Meta tags inspector still active?: Unverified. Meta tags inspector 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 Meta tags inspector?: Similar projects tracked by PulseGate include SEO Tag Inspector, Meta Dock, and Inspector DOM Sidebar.SEO Tag Inspector Meta Dock Inspector DOM Sidebar
Who develops Meta tags inspector?: Meta tags inspector is developed by MDN Web Docs.
When did Meta tags inspector launch?: Meta tags inspector first shipped in 2021.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 10 Sept 2026
Built for: Firefox extension developers and web developers
Model: Open source
Solves: Inspecting webpage meta tags and metadata during browser development.

Registered as

Firefox Add-ons: meta-tags-inspector

Developer

MDN Web Docs

Index record

Indexed: 10 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 10 Sept 2026

Identity audit (13)

Slug: meta-tags-inspector-github-com
Lifecycle state recorded: 10 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 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: 10 Sept 2026
Canonical URL: https://github.com/mdn/webextensions-examples/tree/main/devtools-panels

Ship this? Send a correction — no account, and you get a link to follow it.

Similar projects

Closest matches by what these projects do