What platforms does Nullgen AI Blocker support?

Nullgen AI Blocker is available on Web App, iOS, Android, MacOS, Windows and Browser extension.

What are the limitations of Nullgen AI Blocker?

Only English language websites are supported today. Desktop agents for macOS and Windows are still marked coming soon. Anyone using the device can uninstall the extension or app unless enforcement is set up.

Nullgen AI Blocker

Name: Nullgen AI Blocker
Author: Nullgen AI Blocker

Stops AI prompts in the browser and blocks AI apps on phones and desktops.

Beginner

Visit Nullgen AI Blocker Back to AI tools

Own Nullgen AI Blocker? Verify ownership to get a dofollow link

FeaturedHand-picked by aiwizard

AI Angels400+ customizable AI girlfriends for NSFW chat, voice calls, and roleplay

Candy AIExperience the future of companionship with AI friends who chat, role-play, and connect with you on a human level.

ourdream.aiA vast AI roleplay platform with millions of characters for chat, images, video and voice

Screenshot of Nullgen AI Blocker, Stops AI prompts in the browser and blocks AI apps on phones and desktops

What is Nullgen AI Blocker?

Nullgen AI Blocker is a productivity tool. Nullgen blocks AI at two layers: a free browser extension that stops typing and pasting into AI prompt boxes on any site, and Pro apps for iOS, Android, and (soon) macOS and Windows that block 100+ known AI apps and destinations on the device.

Nullgen is an AI blocking suite built around a simple split: browsers have a prompt box to intercept, while phones and desktops do not. The free browser extension for Chrome, Edge, Firefox, and Safari recognizes AI prompt fields on any website and blocks typing and pasting into them. It works without an account, runs entirely on the device, and leaves search, research, and the rest of the page usable. Because it hooks the input rather than matching a fixed list of domains, new assistants are covered without waiting for a site list update. The mobile app, available for iOS and Android and included with Pro, takes a different approach. It stops more than 100 known AI apps and websites from loading on the device, in every browser and inside the apps themselves, so it reaches destinations a browser extension cannot see. A macOS and Windows desktop agent is listed as coming soon and is intended to block AI apps across the whole computer, including native desktop clients. The Pro tier adds the management layer. A dashboard handles users and devices, access requests that can be approved or denied, real time policy sync across enrolled browsers and apps, and deployment that pins the extension so it cannot be turned off. Parents can keep homework in a child's own words, educators can enforce integrity on managed school devices, and IT teams can shut down shadow AI use and stop proprietary data reaching public models. Compared with DNS filtering or network proxies, Nullgen avoids certificates and network reconfiguration, which makes setup short but leaves enforcement dependent on the client software staying installed. Only English language websites are supported today, and the desktop agent is not yet shipping.

How do you use Nullgen AI Blocker?

1Install the free browser extension
Add Nullgen from the Chrome Web Store, or install it for Edge, Firefox, or Safari. Installation takes about a minute and needs no account.
2Confirm prompt blocking is on
Open an AI assistant in the browser and try to type in the prompt box. Nullgen blocks the input and shows a blocked notice while the rest of the site keeps working.
3Create a Pro account
Sign up to get access to the admin dashboard, mobile apps, and device management features.
4Enroll users and devices
In the dashboard, add the people you manage, assign approvers, and enroll their phones, tablets, and computers.
5Install the mobile app
Add the Nullgen app on iOS or Android so known AI apps and sites are blocked across the whole device, not just in browser tabs.
6Set policies and review access requests
Decide who can request AI access, then approve or deny incoming requests. Policy changes sync to enrolled devices as they are saved.

Pros and cons

Pros

Free browser extension covers Chrome, Edge, Firefox, and Safari with no account requiredAI
Prompt-level blocking generalizes to new AI assistants without relying on a fixed domain listAI
On-device processing means prompts and browsing history are not uploaded to NullgenAI
Pro dashboard supports access requests, approval workflows, and real time policy syncAI
Deployment controls can pin the extension so users cannot disable or remove itAI

Cons

Only English language websites are supported todayAI
Desktop agents for macOS and Windows are still marked coming soonAI
Anyone using the device can uninstall the extension or app unless enforcement is set upAI
Mobile and desktop blocking depends on a maintained list of known AI destinationsAI
No API or third party integrations are documented, so it will not plug into existing security stacksAI

How much does Nullgen AI Blocker cost?

Free trial

A free trial of Nullgen Pro is offered through the signup page. The homepage does not state the trial length.

Learn more

Pricing

The browser extension is free forever and is not a trial. Pro is a separate paid tier that adds the admin dashboard, fleet management, access requests, and the mobile and desktop apps. Exact plan prices are not stated in the supplied content.

Learn more

Features

Prompt blocking across Chrome, Edge, Firefox, and Safari; a mobile app that blocks 100+ known AI apps and sites on iOS and Android; a Pro dashboard for users, devices, access requests, real time policy sync, and pinned deployment; on-device detection throughout; a macOS and Windows desktop agent announced as coming soon.

Learn more

Frequently asked questions about Nullgen AI Blocker

How much does Nullgen AI Blocker cost?
The browser extension is free forever and is not a trial. Pro is a separate paid tier that adds the admin dashboard, fleet management, access requests, and the mobile and desktop apps. Exact plan prices are not stated in the supplied content.
Does Nullgen AI Blocker offer a free trial?
A free trial of Nullgen Pro is offered through the signup page. The homepage does not state the trial length.
How do you use Nullgen AI Blocker?
The walkthrough on this page covers 6 steps: 1. Install the free browser extension 2. Confirm prompt blocking is on 3. Create a Pro account 4. Enroll users and devices 5. Install the mobile app 6. Set policies and review access requests.
What platforms does Nullgen AI Blocker support?
Nullgen AI Blocker is available on Web App, iOS, Android, MacOS, Windows and Browser extension.
What are the limitations of Nullgen AI Blocker?
Only English language websites are supported today. Desktop agents for macOS and Windows are still marked coming soon. Anyone using the device can uninstall the extension or app unless enforcement is set up.