Specifically built for Facebook & Meta Ads

Your Facebook Ads
are bleeding moneyright now.

Some of your active ads are sending clicks to broken 404 pages. You don't know it. Your clients don't know it. Every click is money gone.

404Watcher is the only automated tool that scans every Facebook Ad URL for you — every 24 hours, zero effort.

847 broken Facebook Ad URLs detected across our users today

Start for €0.99/mo → See how it works →

Meta verified app · Read-only · No ad changes · No posting · No billing access · €0.99/mo

The hidden cost of undetected 404s in Facebook Ads

Your Meta Ads Manager doesn't tell you when a landing page breaks.
Nobody does — unless you have 404Watcher.

You pay per click. Always.

Meta charges you for every click — even if the user lands on a broken 404 page. There's no refund, no pause, no warning. The budget just drains.

It can go unnoticed for weeks.

Landing pages break during server updates, domain changes, or campaigns going live at odd hours. Most agencies discover it by accident — or from an angry client.

Facebook doesn't control this!

Facebook's platform has no built-in URL health check. It will keep delivering your ads and charging your budget even if every single landing page returns a 404.

The App

Everything in your pocket — monitor anytime, anywhere

The 404Watcher dashboard is fully mobile-optimised. Just open your browser, log in, and instantly see the health status of every Facebook Ad account — anywhere, anytime.

Instant push & email alerts

Get notified the moment any Facebook Ad URL returns a 404 or 503.

Live scan history per account

See every past check per client — when it ran, what was found, what was clean.

Manual on-demand scan

Don't wait 24 hours. Trigger a scan of any account with one tap.

Setup in 2 minutes

Start protecting your Facebook Ads today

No developer. No technical setup. Just connect and we do the rest.

Connect via Facebook Login

Sign in with Facebook. We sync all Ad Accounts linked to your profile using the official Meta Graph API — read-only, zero risk to your campaigns.

We Scan Every Active Ad

Every 24 hours, our engine checks the destination URL of every active Facebook & Instagram ad across all selected accounts. Thousands of links in seconds.

Get Alerted Instantly

The moment a broken URL is detected, you get an email with the exact ad account, campaign, ad ID, and the broken link. Fix it before budget burns.

Features

The only tool that watches your Facebook Ads URLs for you

100% Read-Only

We use the official Meta Graph API with strict read-only OAuth permissions. We can see your ads to monitor them — but we can never touch, modify, or pause any of your active campaigns.

Zero Ongoing Effort

Connect once. We handle everything after that. Daily automated scans, instant alerts, and zero manual work for you or your team. Once it's set up, it stays on autopilot, protecting your budget 24/7 while you focus on scaling.

Built for Agencies

Manage all your client Facebook Ad Accounts from one central dashboard. Monitor 1 client or 200+ with the same ease. Scale your agency without increasing your manual auditing workload.

Perfect for media buyers managing multiple high-spend portfolios who need a silent safety net that never sleeps.

Facebook & Instagram

We check URLs in all Meta ad types. This includes Destination URLs, deep links, and even complex UTM-appended tracking URLs.

Instant Alerts

The moment a 404 is detected you get an email. Act in seconds to fix the issue before you waste a single cent of your daily ad budget.

Full Scan History

Every check is logged. See per-account scan logs — what was scanned, when, and the exact status of each URL. Perfect for reporting.

Bank-Grade Security

Your access tokens are AES-256 encrypted. We take security seriously, ensuring your client data and Meta connections remain private.

Pricing

Lock in launch pricing today

These prices exist for early adopters only. Once we hit capacity, prices go up permanently. Those who purchase a subscription now will stay at introductory prices forever!

Save up to 67% right now.

Solo

1 client monitored
Automated scans of every active ad URL
Instant email notification the moment a 404 error is found
Full monitoring dashboard (Mobile responsive!)

Freelancer

Up to 20 client accounts monitored
Automated scans of every active ad URL
Instant email notification the moment a 404 error is found
Full monitoring dashboard (Mobile responsive!)

Pro

Up to 50 client accounts monitored
Automated scans of every active ad URL
Instant email notification the moment a 404 error is found
5 on-demand scans/day — fix a link and verify it live
Full monitoring dashboard (Mobile responsive!)

What performance marketers say

"404Watcher caught 12 broken landing pages in our very first scan. We were burning over €500 a day on dead Facebook Ad clicks — without even knowing it. It paid for itself in the first hour."

Sarah M.

Performance Marketing Lead · 38 clients

"I manage hundreds of Facebook ads solo. I don't have time to audit URLs manually. 404Watcher runs every night and I wake up knowing everything's fine — or exactly what needs fixing."

Tom P.

Freelance Media Buyer

"A client's product page went 404 over the weekend. Without 404Watcher we'd have lost the whole weekend's Meta budget. Instead we got alerted Saturday night and fixed it in 10 minutes."

Lena B.

Head of Paid Social · E-commerce Agency

FAQ

Common questions

How does 404Watcher connect to my Facebook Ads?

You sign in with Facebook Login. We use the official Meta Graph API to sync your Ad Accounts with read-only access. We never edit, pause, or modify anything in your ad account.

What types of errors does it detect?

We check for 404 (Not Found) and 503 (Service Unavailable) errors — the clearest indicators that a landing page is broken and your ad budget is being wasted.

How often does it scan my ads?

Automated scans run every 24 hours. PRO and AGENCY plans also get manual on-demand scans you can trigger anytime from your dashboard.

What counts as a "client"?

Each Facebook Ad Account counts as one client. If you manage 20 different ad accounts in your Business Manager, that's 20 clients.

Will it slow my account or trigger Meta rate limits?

No. We use batch processing and respect Meta's rate limits. Our system is designed to stay well within API thresholds so your account is never impacted.

Can I cancel anytime?

Yes. Cancel directly from your dashboard. Your access remains active until the end of the billing period. No hidden fees, no exit penalties.

Your Facebook Adsare bleeding moneyright now.