JWT Debugger

Name: JWT Debugger
Rating: 5 (5 reviews)
Author: JWT.io

By: JWT.io

The JWT.io debugger as a Web Extension

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Features & Capabilities

JWT Debugger is a powerful browser extension based on the popular JWT.io debugger. Designed to streamline your workflow, it allows you to debug JSON Web Tokens directly within your browser without opening external sites or consoles.

This extension offers extensive support for multiple signature algorithms including HS256/384/512, RS256/384/512, PS256/384, and ES256/384. You can easily edit all JWTs from the current tab, whether stored in cookies or web storage, and get shareable URLs for quick communication. Features such as claim tooltips, human-readable timestamp tooltips, and automatic public-key downloads enhance usability and performance. JWT Debugger is open source and maintained by Auth0, ensuring reliable and up-to-date JWT debugging capabilities directly in your browser.

User Growth & Download Statistics

Add-on Developer Tools Programming Privacy & Security

By:

JWT.io

Daily users:

1,030 -15

Rating:

5.00

(5)

Version:

3.2.0 Last updated: 2020-03-16

Version code:

4983243

Creation date:

2018-02-28

Risk:

Permissions:

Content scripts matches:

jwt.io

Size:

495.57KB

Email:

su*****@auth0.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 3,185 ▼ 10

Other rankings

#354 in Web Development ▼ 1#9 in debug keyword 35 #38 in algorithm keyword 3 #186 in console keyword 16 ▲ 3

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

JWT.io

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/jwtio-debugger/

Email:

su*****@auth0.com

Website:

https://github.com/jsonwebtoken/jsonwebtoken.github.io

Is JWT Debugger Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

JWT Debugger requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

JWT Debugger has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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