No payment info required.
Sign up if you like what you see.
Would you notice if slow pages were killing your rankings? These issues creep up gradually - by the time you see it, traffic's dropped. We run daily Lighthouse checks (Google's own metrics) and alert you the moment something regresses.
Start monitoring
10 day free trial No credit card required
Google doesn't just look at your content - it measures how fast your site loads, how accessible it is, and whether you follow SEO best practices. These metrics directly affect your search rankings.
A slow site gets pushed down in search results. Missing alt text on images hurts your SEO score. Poor mobile performance loses you mobile traffic.
The problem? These scores degrade over time. A single 23MB PNG uploaded to your CMS can tank your performance score overnight. An innocent code change can break accessibility. You won't know until you check - or until Google drops your rankings.
We check daily and alert you the moment scores drop, so you can fix issues before they hurt your search visibility.
Most teams check Lighthouse scores one of three ways: opening Chrome DevTools after a deploy, running PageSpeed Insights when something feels off, or hiring SEO consultants to audit quarterly.
The problem? None of these catch regressions as they happen. You only find out when someone remembers to check - or when you notice traffic dropping.
By then, slow performance or accessibility issues have already hurt your rankings for days or weeks. Google's already pushed you down in search results.
We run checks daily and alert you within minutes of a score dropping. Fix issues while they're fresh, before they impact your search visibility or conversions.
Performance for urlxyz.xyz has dropped. Full report: https:/ohdear.app/monitors/83/checks/411
SEO for urlxyz.com has dropped. Full report: https:/ohdear.app/monitors/85/checks/412
Accessibility score for urlxyz.be has increased! Full report: https:/ohdear.app/monitors/86/checks/413
$_TOKEN="your API token" $ curl -X GET "https://notifyservicexyz.com/api/alert/urlxyzcom" \ -H "Authorization: Bearer $_TOKEN" \ -H "Accept: application/json" \ -H "Content-Type: application/json"
Performance for urlxyz.xyz has dropped. Full report: https://app.opsgenie.com/monitors/83/checks/411
SEO for urlxyz.com has dropped. Full report: https://app.opsgenie.com/monitors/83/checks/123
Accessibility score for urlxyz.be has increased! Full report: https://app.opsgenie.com/monitors/83/checks/321
Performance for urlxyz.xyz has dropped. Full report: https:/pagerduty.com/monitors/83/checks/411
SEO for urlxyz.com has dropped. Full report: https:/pagerduty.com/monitors/85/checks/412
Accessibility score for urlxyz.be has increased! Full report: https:/pagerduty.com/monitors/86/checks/413
Receive our notifications on your preferred platform. Via email, SMS, Slack, Discord, Opsgenie, PagerDuty, Microsoft Teams, Pushover, webhooks,… we can notify you wherever your team is active.
Take notifications to the next level: only notify who needs notifying by assigning responsibilities to different team members.
Lighthouse doesn't just tell you scores are low - it gives you specific, actionable recommendations with estimated time savings for each fix.
For example: "Reduce unused JavaScript: save 450KB (0.8s faster)" or "Properly size images: save 2.1MB (1.2s faster)." You'll know exactly which improvements have the biggest impact on performance.
This means you can prioritize fixes that matter most: tackle the 2.1MB image problem before optimizing font loading that only saves 0.1s. No guesswork, no wasted effort on low-impact changes.
Every recommendation includes file names, line numbers, and technical details your developers need to fix the issue quickly.
A single Lighthouse check tells you where you are right now. Historical tracking shows you where you've been - and more importantly, what caused scores to change.
When your performance score drops from 95 to 78, you can pinpoint the exact day it happened and correlate it with deploys, content updates, or third-party script changes. No more guessing what broke your scores.
When you implement fixes, you'll see scores improve in the next check. Track the impact of optimizations over weeks and months - prove to stakeholders that performance work delivers real results.
Historical data also reveals gradual degradation. Scores don't usually tank overnight - they slowly decline as you add features, content, and complexity. Daily monitoring catches these trends before they become serious problems.
E-commerce teams where a 1-second slowdown means lost sales. Performance regressions directly impact conversion rates and revenue.
Marketing teams driving traffic through SEO and paid ads. If your site ranks well but loads slowly, you're paying for traffic that bounces before converting.
Product teams shipping frequently who need to catch performance regressions before they reach production. A single deploy can tank your Lighthouse scores.
Agencies managing client sites who need to prove they're maintaining performance and accessibility standards. Automated reports show you're staying on top of Core Web Vitals.
Anyone with a public website who wants Google to rank them higher. Core Web Vitals are a ranking factor - monitoring them is monitoring your search visibility.
Lighthouse excels at measuring technical performance, accessibility compliance, SEO fundamentals, and best practices. It simulates a mobile device loading your site and measures exactly what Google's ranking algorithm cares about.
What it checks: page load speed, Core Web Vitals (LCP, FID, CLS), image optimization, JavaScript bundle size, accessibility issues (screen reader compatibility, color contrast, alt text), SEO basics (meta tags, structured data, mobile-friendliness), HTTPS usage, and modern web best practices.
What it doesn't check: content quality, keyword optimization, backlinks, or anything requiring human judgment. Lighthouse measures the technical foundation that makes good content discoverable and usable - but it won't tell you if your content is compelling or well-written.
Think of it this way: Lighthouse ensures Google can find, crawl, and rank your site. Content strategy ensures people want to read it once they arrive.
Start a no-strings-attached 10-day free trial. You're all set in less than a minute. (No credit card needed.)
Not convinced yet? Need help? Get in touch via [email protected].
Want to get into the nitty gritty details of our monitoring? Have a look at our documentation.
SSL certificates are essential in website security. We check all your certificate expiration dates & alert any change we detect.
We provide highly detailed performance monitoring and insights. We'll notify you as soon as we detect your website is getting slow.
Get notified instantly as soon as we detect an issue or an important change. Enable any channel you use, you're in full control.
Your cron jobs (Linux) and scheduled tasks (Windows) are the heart of your data processing. We can monitor every single one of them.
We crawl and index your entire website, just like Google. As soon as we detect a broken link on your site we will let you know.
Receive a notification whenever your DNS records are modified - intentionally or maliciously - so you can act and verify faster.
A lot can go wrong inside your app and server. Disk space may fill up, or the database may go down. We'll notify you when something is off.
In times of crisis, a public status page allows you to communicate to your clients. We'll host your status page so it's always available.
When your website goes down we'll let you know instantly. Now you can act before your or your client's brand reputation takes a hit.
We can check how long your domain is still registered. If your renewal date is close, we'll notify you. This will avoid you losing your domain.
Elevate your SEO strategy and optimize your site. We analyse your sitemap health and check every URL for broken links.
Use AI to verify anything you want on your websites and services with Oh Dear's AI monitoring feature.
Reach out to us with any questions, suggestions or bugs.
We're available on all weekdays and usually reply within one working day.
No 3rd party tracking, no invasion of your privacy - this site is tracking-cookie free.