Website monitoring for developers
Track front-end performance and quality metrics for your production site and in CI.
Keep your website fast
User-centric performance metrics
Track metrics like First Contentful Paint, Largest Contentful Paint, and Time to Interactive. Or set up user timing metrics tailored to your website.
Monitor Lighthouse scores
Track the scores provided by Google's Lighthouse tool for performance, accessibility, best practices, and SEO. Lighthouse is what runs PageSpeed Insights behind the scenes.
Bundle size monitoring
See how the size of each bundle changed over time, and compare the minified JavaScript code to see what changed.
Take action
Performance recommendations
Improvement opportunities tailored to your website. View a full Lighthouse quality report for each analysis.
Compare page weight at a per-file level
Wondering what part of your code just got larger? DebugBear will tell you exactly what file changed and let you compare both versions. This works even if there's a changing hash in the file name.
Access past page versions
Trying to figure out when a bug was introduced or how a feature used to work before? Load a fully interactive archive of the old page version in your browser.
How it works
Nothing to install
Just enter the URLs of the pages you want to monitor and we'll do the rest.
Share results with your team
Invite as many users as you like, so everyone has access to performance data. Or share give everyone access with a shareable URL.
Configure device type and location
Monitor mobile and desktop performance, in the region where your users are.
Advanced features
Access pages behind authentication. Disable GDPR notices with custom scripts. Block third-party requests to monitor just your own code. Set performance budgets to keep your site fast.
Intelligent alerts
Automatic change notifications
Did you JavaScript bundle get bigger? Got a slow server response? Added a new image without an alt tag? Using a deprecated API? All of these can trigger an alert.
Detailed change information
See exactly what file, metric, or Lighthouse audit changed – and why!
Get alerts by email or in Slack
Set up alerts in the way that's most convenient to you.
API and Continuous Integration
Run tests with the API
Use the command line interface or API to analyze each build and catch regressions early. Deploy to a staging server or use ngrok to allow access to your CI environment.
Automate setup and export monitoring results
Programmatically configure what pages to monitor and download monititoring metrics as CSV or JSON.
Github integration
Report build results Github as part of your pull requests.
