99Tools: Web Developer Toolkit

Name: 99Tools: Web Developer Toolkit
Author: 99Tools

Power up your browser with 800+ professional developer, SEO, and text tools. The official 99Tools extension for fast and pro-grade productivity.

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Features & Capabilities

Unlock a massive library of 800+ professional tools directly from your browser toolbar. Designed for developers, SEO experts, and power users, the official 99Tools extension brings the full power of 99Tools.net into a single, lightning-fast popup interface.

Key Feature Categories:

Developer Utilities: JSON Formatter, CSS Minifier, Base64 Encoder, JWT Debugger, and more.
SEO & Webmaster Tools: Schema Generator, Keyword Density Checker, Redirect Tracker, and SERP Preview.
Text Manipulation: Case Converter, Word Counter, Remove Duplicate Lines, and Regex Tester.
Image Tools: WebP Converter, Image Resizer, and All Types Of Image Converters.

Why Choose 99Tools?

800+ Tools in One Place: The most comprehensive utility suite available on the store.
Privacy First: We do not collect, store, or transmit any personal data. Your workflow remains yours.
Professional Grade: Built by a team with over 10 years of experience in web development and SEO.
Lightning Fast: Instant search and easy "Favorites" tab for your most-used utilities.

User Growth & Download Statistics

Add-on

By:

99Tools

Daily users:

Version:

1.0 Last updated: 2026-04-13

Version code:

6215808

Creation date:

2026-04-10

Risk:

Size:

31.97KB

Email:

he*****@99tools.net

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 102,487 ▲ 301

Other rankings

#62 in developer tools keyword 60 ▲ 3#109 in developer keyword 68 ▼ 2

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:

99Tools

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/99tools-web-developer-toolkit/

Email:

he*****@99tools.net

Website:

https://99tools.net/

Is 99Tools: Web Developer Toolkit 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.

99Tools: Web Developer Toolkit does not require any sensitive permissions.

Risk impact analysis details

Low This permission has no access or impact on the user's system or data, thus carrying no risk.

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.

99Tools: Web Developer Toolkit is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

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