Free Chrome extension · coming soon
See who’s watching.
Browser Monster shows you the trackers on every page, where they send your data, what you agreed to in cookie banners and the profile it all adds up to. Then it helps you fight back.
- Works on your device
- Never sells your data
- No account needed
Before you’ve clicked anything
You haven’t accepted anything yet. Plenty of companies already have.
15
companies
loaded on a big UK news homepage before the cookie banner was even answered.
133
“technology partners”
listed in one recipe site’s cookie banner.
£3.49
a month
what that same site charges to say no.
51
companies
watched our founder across 77 sites. Google alone saw 164 of his pages.
Measured with Browser Monster on 19 October 2026. Sites left unnamed on purpose: they’re typical, not unusual.
How it works
A mirror, not a lecture.
- 1
Add it to Chrome
One click from the Chrome Web Store. No account, no sign-up, no settings to fiddle with.
- 2
Browse like normal
The monster sits in your toolbar and reacts to every page. It watches the watchers; it doesn’t slow you down.
- 3
Open the dashboard
See everyone who followed you, where your data went and the profile they built. Then fix it, one card at a time.
Your toolbar has a mood now
Glance at the icon and you know what the page is doing to you.
Calm
Nothing watching. Chrome pages, new tabs and the rare clean site.
Watching
Analytics on the page. It counts them and keeps an eye out.
Alert
Ad or cross-site trackers just loaded. The badge shows how many.
30 seconds
One real browser. Real numbers.
Every figure in this video came from Browser Monster running in our founder’s own browser. No actors, no made-up stats.
What you’ll see
Everything your browser gives away, on one dashboard.
Every finding comes with a plain-English fix. Screenshots show sample data.
Data map
Where your data went
A globe of every server your browsing was sent to, drawn from you to them. Ashburn, Dublin, Frankfurt: click a city to see which companies are there and what each request carried.
Your profile
The profile they’ve built
Ad companies don’t see a name. They see a bundle of interests, habits and device details. Browser Monster estimates that bundle on your device, so you can see yourself the way they do.
Companies
Who knows what
A file on every company that followed you: how much of your browsing it saw, what it probably inferred, where it sent it, and a ready-made UK GDPR letter asking what it holds.
- Tracked after “no”
Consent receipts
What you actually agreed to in each cookie banner, in plain English. Plus a flag when trackers keep loading after you said no.
- A–F
Privacy score
An A–F grade for your browser with one-click “fix next” cards. Watch it climb as you clean up.
Cookie inventory
Every cookie, grouped by the company behind it. “This one lasts two years.” Clear them by site or by company.
Fingerprinting alerts
Spots canvas, audio and font tricks that identify your device without a single cookie.
Email and search leaks
Tells you when your email address or search terms are passed to other companies.
Extension audit
Lists installed extensions that can read every page you visit, AI tools included.
Our promise
We’re not the monster.
A privacy tool that harvests your data is just another tracker with better branding. So we built Browser Monster to have nothing to harvest.
We never sell your data. Not even if you ask us to.
Worked out on your device
Tracker matching, server locations and your profile are all computed inside your browser. Even the world map is bundled in.
Nothing uploaded
The extension sends no browsing data anywhere. No analytics SDKs, no remote logging, no “anonymous” usage stats.
Never sold. Ever.
Not to advertisers, not to data brokers, not “aggregated”. We looked at letting you sell your own data, and said no.
Sensitive stuff stays hidden
Health, money, religion and politics are hidden by default and never appear on anything shareable unless you switch them on.
Pricing
Seeing who’s watching is free. Fighting back for you is Pro.
Pro pays for the work we do on your behalf. It never involves your data leaving your control.
Free
£0 forever
The whole mirror. No trial, no feature timer.
- Live tracker count on every page
- Data map, profile and company files
- Consent receipts and cookie inventory
- Privacy score with “fix next” cards
- Fingerprinting, email and search leak alerts
- UK GDPR request letters you send yourself
Pro
Coming soonEverything in Free, plus the monster does the legwork.
Data requests, done for you
We send GDPR requests to the companies that watched you and track the replies.
Monitoring alerts
A heads-up when a new company starts following you or a site changes what it collects.
Tracker blocking
Block a company or destination in one click, with an undo. In testing now.
Family plan
Keep an eye on the browsers in your household from one place.
Pricing announced at launch. Join the list to hear first.
FAQ
Fair questions
Is it really free?
Yes. Everything that shows you who’s watching is free, with no time limit. Pro will charge for things we do on your behalf, like sending data requests to companies. We will never pay for it by selling your data.
Does Browser Monster block trackers?
Not by default. It’s a mirror, not a blocker: it shows you what happens so you can decide. Every finding comes with a fix, like clearing a company’s cookies or switching off a leaky Chrome setting. Optional blocking is being tested for Pro.
What data does Browser Monster collect about me?
From the extension, none. Everything is worked out and stored in your browser, and it makes no server calls containing your browsing. If you join the waitlist on this site, we keep your email address so we can tell you when it launches. That’s it.
Why does it ask for so many permissions?
To see trackers it has to watch the requests pages make and read the cookies they set. It only observes; it doesn’t change pages. Extra permissions, like reading your history to build your profile, are optional and only requested when you tap the feature that needs them. Each one is explained before Chrome asks.
How accurate is “the profile they’ve built”?
It’s an estimate made on your device from the sites you visit, using the same kind of interest categories the ad industry uses. Companies don’t publish what they hold on you, which is why we also give you ready-made letters to ask them.
Will clearing cookies sign me out of things?
It can. Browser Monster shows you exactly what will be deleted before you confirm, and lets you clear by company or site rather than everything at once.
Which browsers does it work on?
Google Chrome on desktop at launch. Other Chromium browsers like Edge and Brave may work but aren’t officially supported yet.
Now fight back.
Be first to meet the monster when it lands in the Chrome Web Store.