Peek under the hood
of any website
One click shows you what any site is built with, where it's hosted, how old it really is, and who's tracking you — explained in plain English.
Installs free from the Chrome Web Store · $29 unlocks everything
See what Fusebox sees
Four sites, four verdicts — this is the actual extension view, preloaded with example scans. Click around.
Fuseboxnova-pilot.appA Lovable-built marketing site deployed on Vercel. The domain is 19 days old with no archive history and light, typical tracking. The product may well be real — the company just has no track record yet, so treat bold claims accordingly.
RDAP: created 2026-06-21 · registrar Namecheap
Brand-new domains deserve extra scrutiny.
script cdn.gpteng.co · meta lovable-tagger
Vibe-coded isn't bad — but shipping fast isn't a track record.
Every line comes with a "why" — the real extension lets you click any row to see the evidence behind it.
Illustrative example sites, not real businesses.
Other tools give you a list of logos. You still have questions.
"React. Nginx." doesn't answer the question you actually have. Fusebox opens with an answer — a verdict — and shows the evidence behind it one scroll below.
"Is this a real product?"
That slick startup site — a genuine product, or a weekend AI build with a 3-week-old domain? Fusebox tells you which.
"Why does my site look broken when I share it?"
Point Fusebox at your own project to catch missing link previews, misconfigured basics, and other quiet mistakes — with a fix suggested for each.
"Can I trust this checkout?"
Domain age, hosting, trackers, and history in one readout — the signals you actually check before handing over a card.
"What did they build this with?"
See the tools and services powering any site you admire, so you can build something like it — with the receipts to prove each call.
Fusebox answers all of them for one $29 purchase
Eight reports. One verdict. Receipts for every claim.
Every detection carries its evidence — the exact header, script, DNS record, or metadata it was based on — and a confidence level. No vibe scores. No "trust the logo."
Verdict
Fusebox opens with an answer, not tabs. A short verdict plus 3–5 recommended actions, computed from every report below. Where Chrome's on-device AI is available, it rewrites the findings into a plain-English narrative — streamed live.
- Works for everyone — no AI required
- On-device AI narrative when supported
- Action chips deep-link to the evidence
Origin
Was it vibe-coded? Fusebox catches AI builders — Lovable, v0, Bolt, Framer, Replit, Wix — from the fingerprints they leave behind, with a confidence level, never a fake score.
- script cdn.gpteng.co · meta lovable-tagger
- Confidence, not a made-up percentage
- Honest: hand tools like Cursor are undetectable
Hosting
Where a site actually lives — Vercel, Cloudflare, AWS, Netlify, and more — read from response headers, the CNAME chain, nameservers, and ASN owner.
- header x-vercel-id · CNAME chain
- Nameservers + ASN / network owner
- Combined signals → a confidence level
Tech Stack
Frameworks, meta-frameworks, CMS, ecommerce, analytics, payments, auth, fonts, and CDNs — detected from a clean-room fingerprint set built and maintained in-house.
- 270+ curated, evidence-backed fingerprints
- Every match carries its evidence
- No scraped logo lists
Domain
How old the domain really is, who registered it, and how it resolves — real WHOIS over RDAP plus DNS records and the network owner behind the IP.
- RDAP WHOIS: registrar, age, expiry, status
- DNS records (A, MX, NS, TXT)
- IP → ASN / network owner
SEO
On-page SEO and social-preview metadata in one place — titles, meta descriptions, Open Graph, Twitter cards, JSON-LD, and heading structure.
- Title, description & canonical
- Open Graph / Twitter / JSON-LD
- Heading outline at a glance
Trackers
Who's watching. Around 60 tracker and pixel signatures, categorized, plus a rollup of every third-party domain the page talks to — with a one-line 'what it does' for each.
- ~60 tracker & pixel signatures
- Third-party domain rollup
- Category + plain-English purpose
History
How long a site has really existed. Wayback Machine snapshot counts and first/last capture dates — a fresh page with zero history is a signal worth knowing.
- Wayback snapshot count
- First & last archived capture
- Feeds the domain-age verdict
Source viewer
Read the actual page source in a Monaco editor — the raw HTML, scripts, and metadata behind every detection, so you can verify the receipts yourself.
- Full page source, syntax-highlighted
- The raw evidence, unfiltered
- Confirm any detection by hand
From click to verdict in seconds
No configuration, no login, no dashboard to learn. Open the panel and read the answer.
Open the side panel
Click the Fusebox icon on any site. It scans the current tab and starts collecting evidence immediately.
Fusebox gathers the receipts
Headers, DNS, RDAP WHOIS, ASN, trackers, tech fingerprints, and Wayback history — each detection tagged with its evidence and confidence.
Read the verdict
A plain-English answer with recommended actions sits on top, the full reports one scroll below. On supported machines, an on-device AI writes the narrative.
The three bets that make Fusebox different
Verdict, not tabs
Every competitor dumps data. Fusebox opens with an answer and the actions worth taking.
Receipts for every claim
Each detection shows the header, script, or DNS record it was based on — and a confidence level.
Local-first AI
Chrome's built-in Gemini Nano writes the verdict on-device. No API key, no page data sent to a cloud LLM.
Built for the moments you need an answer fast
Vibe coders, makers, careful shoppers, marketers — anyone who needs to know what a website really is, without a computer-science degree.
For vibe coders
You can ship an app with Lovable or Cursor — Fusebox helps you understand what you shipped. Check your own site like a pro, learn what the pieces do, and troubleshoot without begging for help on Discord.
- "Why does my link look broken when I share it?"
- See your own stack, hosting, and settings explained in plain English
- Catch missing previews and quiet mistakes before your users do
- Learn what a CDN or tracker actually is — as you go
Feed your AI the facts
ChatGPT, Claude, and coding agents often can't open the website you're asking about — they're blocked, or guessing from stale training data. Fusebox fixes that with one button: Copy report as Markdown. Paste the whole picture — stack, hosting, domain age, trackers — into any chat. Now your AI is working from facts, not vibes.
- One click, one clean Markdown report
- Paste it into ChatGPT, Claude, or Cursor
- Great for "clone this setup", debugging, and client write-ups
# Fusebox report for nova-pilot.app ## Verdict - Risk: medium - Lovable-built site on Vercel. Domain is 19 days old with no archive history. ## Reports ### Tech Stack - Lovable (high confidence), React, Tailwind ### Hosting - Vercel — header x-vercel-id ### Domain - Created: 2026-06-21 (19 days ago) ### Trackers - Google Analytics 4, Meta Pixel
Free tools hand you logos. Enterprise tools sell you a database.
Fusebox gives you a verdict — with receipts for every claim — for a one-time $29.
Fusebox$29 | Wappalyzer / WhatRuns (free) | BuiltWith / Wappalyzer Pro | Free vibe-detectors | |
|---|---|---|---|---|
| What you get | A verdict | A list of logos | Lead-gen databases | A gimmick score |
| Evidence for every claim | Some | |||
| AI-builder detection (Lovable, v0…) | Score, no receipts | |||
| On-device AI summary + actions | ||||
| Domain age, RDAP WHOIS & DNS | Add-on | |||
| Tracker & third-party rollup | Basic | |||
| Wayback history | ||||
| You're not the product | You're the lead-gen funnel | You're the buyer | ||
| Price | $29 once | Free | $250–$6,000/mo | Free |
$29 once. Not $29 a month.
The first time Fusebox saves you an hour of DNS, WHOIS, and view-source sleuthing — or stops you trusting a three-week-old vibe-coded "store" — it has paid for itself several times over.
$29
One-time. No subscription.
0
Accounts to create.
100%
Of your browsing stays on your machine.
Your browsing never leaves your machine
Page analysis runs locally. A handful of named lookups fetch domain and history data — and that's the whole list. No profiles, no history sold, no lead-gen funnel.
Stays on your machine
- The page's content, DOM, and metadata
- Every technology, hosting, tracker, and origin detection
- The deterministic verdict and its recommended actions
- On-device AI narratives, when your machine supports them
The only external calls
- dns.googleDNS records — sends the domain name
- ipinfo.io (Lite)IP / ASN owner — sends the IP address
- archive.orgWayback history — sends the domain name
- RDAP registriesWHOIS / domain age — sends the domain name
- Fusebox license WorkerLicense check & payment — sends your key, not your browsing
The AI verdict runs on-device
The narrative verdict uses Chrome's built-in Gemini Nano — no API key, no page data sent to a cloud LLM. If you deliberately turn on the optional bring-your-own-key mode, and only then, the report context you choose is sent to the provider you configure.
Frequently asked questions
Straight answers — including where the honesty gets uncomfortable.
Still have questions?
See what any website is really made of.
One click, one verdict, receipts for every claim. $29 once — no subscription, no account, no lead-gen.