Facebook Ads URL Checker - Stop Wasting Budget on 404 Errors | 404Watcher
Specifically built for Facebook (Meta) Ads

Your Facebook Ads are bleeding money

404Watcher checks every active ad URL every hour and alerts you the moment a landing page breaks.

Run FREE AUDIT One-time, free of charge. No card needed.
Start for €3.70/mo
Meta verified App Meta Verified
INSTANT ALERTS BUILT FOR AGENCIES 100% READ-ONLY AUTOMATED HOURLY CHECKS META VERIFIED APP BANK-GRADE SECURITY INSTANT ALERTS BUILT FOR AGENCIES 100% READ-ONLY AUTOMATED HOURLY CHECKS META VERIFIED APP BANK-GRADE SECURITY

This is 404Watcher App

Check Status
Instant overview of your account health.
Check Overview
Summary statistics of your latest scans.
Account Management
All accounts shared with your profile ready for auto-monitoring.
Sarah Jenkins AGENCY MAX TIER Logout

DASHBOARD

Active Subscription

Welcome to 404Watcher dashboard.
Below you'll find a summary of recent checks.

ALL FACEBOOK AD ACCOUNTS LOOK GOOD

The last check scanned 157 Facebook Ad accounts and found no broken links. Great job!

Latest check: 30. 4. 2026
MONITORED
157/200 Accounts
LAST CHECK
30. 4. 2026
MANUAL CHECKS
29/30 left
ALERTS
0 Broken Links
Facebook Ads Accounts
Notifications
Billing
1.
Skyline Digital
History
Monitor
Manual Check
2.
Oceanic Retail
History
Monitor
Manual Check
3.
Velvet & Vine
History
Monitor
Manual Check
4.
404Watcher
History
Monitor
Manual Check
5.
Stellar SaaS
History
Monitor
Manual Check
6.
GreenLeaf Org
History
Monitor
Manual Check
7.
Pulse Media
History
Monitor
Manual Check
8.
Nova Nexus
History
Monitor
Manual Check
9.
Aether Agency
History
Monitor
Manual Check
10.
Lumina Labs
History
Monitor
Manual Check

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.

01

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.

02

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.

03

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.

Check Status
Instant overview of your account health.
Check Overview
Summary statistics of your latest scans.
Account Management
All accounts shared with your profile ready for auto-monitoring.
Sarah Jenkins AGENCY MAX TIER Logout

DASHBOARD

Active Subscription

Welcome to 404Watcher dashboard.
Below you'll find a summary of recent checks.

ALL FACEBOOK AD ACCOUNTS LOOK GOOD

The last check scanned 157 Facebook Ad accounts and found no broken links. Great job!

Latest check: 30. 4. 2026
MONITORED
157/200 Accounts
LAST CHECK
30. 4. 2026
MANUAL CHECKS
29/30 left
ALERTS
0 Broken Links
Facebook Ads Accounts
Notifications
Billing
1.
Skyline Digital
History
Monitor
Manual Check
2.
Oceanic Retail
History
Monitor
Manual Check
3.
Velvet & Vine
History
Monitor
Manual Check
4.
404Watcher
History
Monitor
Manual Check
5.
Stellar SaaS
History
Monitor
Manual Check
6.
GreenLeaf Org
History
Monitor
Manual Check
7.
Pulse Media
History
Monitor
Manual Check
8.
Nova Nexus
History
Monitor
Manual Check
9.
Aether Agency
History
Monitor
Manual Check
10.
Lumina Labs
History
Monitor
Manual Check
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.

01

Instant push & email alerts

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

02

First audit is free

Your first one-time audit scans every ad account on your Facebook profile, completely free.

03

First 7 days free

Try the full service free for 7 days, you are only charged after the trial, so you can test it risk-free.

Setup in 2 minutes

Start protecting your
Facebook Ads today

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

01

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.

02

We Scan Every Active Ad

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

03

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 unique tool that watches your
Facebook Ads URLs for you

01

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.

02

Zero Ongoing Effort

Connect once. We handle everything after that. Hourly 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.

03

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.

04

Facebook & Instagram

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

05

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.

06

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.

07

Bank-Grade Security

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

Free Audit

See what your ads are hiding. For free.

Every new user gets one FREE AUDIT: a one-time check of all ad accounts connected to their Facebook profile. Sign in, click one button and see the results in your dashboard within minutes.

What we check

Every ad account on your Facebook profile and every active ad in them. We test each destination URL for 404 and 503 errors, the clearest signs that your money lands on a dead page. Read-only, no changes to your campaigns.

Hours of work in minutes

Checking 100 ad accounts by hand means opening every active ad and testing every link: realistically 16 to 25 hours of clicking, two to three full working days. The audit does the same job automatically in minutes.

Money it can save

Imagine spending €400 a day on ads. If just 10 to 20 % of that budget flows through one broken link, you lose €40 to €80 every single day and nobody notices. In a week that adds up to €560 wasted.

Run your FREE AUDIT now

One audit per user. Free of charge, no credit card, results in your dashboard within minutes.

Pricing

Simple pricing that protects your budget

Every plan includes hourly automated scans, instant email alerts and the full dashboard. No hidden fees. Cancel anytime.

Solo

€3.70 //mo

First 7 days free

  • Up to 10 client ad accounts
  • Automated scans every hour
  • Instant email alerts for 404 and 503 errors
  • 10 manual scans per day
  • Complete dashboard (Mobile optimized!)
Get Solo
Most Popular

Pro

€5.99 //mo

First 7 days free

  • Up to 50 client ad accounts
  • Automated scans every hour
  • Instant email alerts for 404 and 503 errors
  • 50 manual scans per day
  • Complete dashboard (Mobile optimized!)
Get Pro

Agency Max

€15.99 //mo

First 7 days free

  • Up to 200 client ad accounts
  • Automated scans every hour
  • Instant email alerts for 404 and 503 errors
  • 200 manual scans per day
  • Complete dashboard (Mobile optimized!)
Get Agency Max

Read-only access · No developer needed · Up and running instantly · from €3.70/mo

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?
All paid plans are scanned automatically every hour. On top of that, every plan includes manual on-demand scans you can trigger anytime from your dashboard: 10 per day on Solo, 50 on Pro and 200 on Agency Max.
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.
Don't wait for a client to notice first

Your Facebook Ads URLs are not
being checked right now

Every hour without 404Watcher is an hour your budget could be bleeding into broken pages. Start in 2 minutes, protect forever.

Run FREE AUDIT One-time, free of charge. No card needed.
Start for €3.70/mo
Meta verified App Meta Verified