What does Token Inspector do?

Token Inspector focuses on inspecting and understanding JWT token contents without manually decoding them. It is catalogued under Browser DevTools & extensions on PulseGate.

Who should use Token Inspector?

Token Inspector is a consumer product built for developers and security professionals.

Is Token Inspector free?

Yes — Token Inspector is free to use.

What platforms does Token Inspector run on?

Token Inspector runs on the web and embeddable surfaces.

Is Token Inspector still active?

Unverified. Token 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.

Who develops Token Inspector?

Token Inspector is developed by Sarah Young.

How long has Token Inspector been around?

Token Inspector first shipped in 2026.

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Token Inspector

Name: Token Inspector
Author: Sarah Young

mozilla.orgBrowser DevTools & extensions

Token Inspector is a Firefox browser extension that decodes JSON Web Tokens and displays their claims. It is intended for developers and security professionals inspecting authentication tokens during development or troubleshooting.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

In the Browser DevTools & extensions space, Token Inspector takes a focused approach. It focuses on inspecting and understanding JWT token contents without manually decoding them. Token Inspector is a consumer product aimed at developers and security professionals. It is available for free. Token Inspector is available on the web and embeddable surfaces.

Sarah Young builds and maintains Token Inspector, and it first shipped in 2026. Key capabilities include JWT decoding, claims viewing, and token inspection. The interface is available in 32 languages, including Czech, German, and Greek.

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

JWT decoding
Claims viewing
Token inspection
No data collection
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sept · 01:08 UTC
Token Inspector verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Token Inspector

What does Token Inspector do?: Token Inspector focuses on inspecting and understanding JWT token contents without manually decoding them. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Token Inspector?: Token Inspector is a consumer product built for developers and security professionals.
Is Token Inspector free?: Yes — Token Inspector is free to use.
What platforms does Token Inspector run on?: Token Inspector runs on the web and embeddable surfaces.
Is Token Inspector still active?: Unverified. Token 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.
Who develops Token Inspector?: Token Inspector is developed by Sarah Young.
How long has Token Inspector been around?: Token Inspector first shipped in 2026.
What languages does Token Inspector support?: The interface is available in 32 languages, including Czech, German, and Greek.

At a glance

Pricing: Free
Platforms: Web
First seen: 10 Sept 2026
Built for: developers and security professionals
Model: B2C
Solves: Inspecting and understanding JWT token contents without manually decoding them.

Registered as

Firefox Add-ons: token-inspector

Developer

Sarah Young

Index record

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

Identity audit (13)

Slug: token-inspector-mozilla-org
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: Derived from the project's own page and URL.
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://addons.mozilla.org/en-US/firefox/addon/token-inspector

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