Site speed monitoring features

Website Monitoring

Continuous Monitoring

Test your pages as often as you need, whether hourly or weekly.

Real User Monitoring

Collect real user Core Web Vitals analytics on your website.

30+ Locations Worldwide

See where users experience the biggest performance problems, whether in Australia or Brazil.

Mobile and Desktop Tests

Test your site on different device formats and configure network round-trip time and bandwidth. You can also throttle the CPU to simulate a less powerful device.

Quality Data

DebugBear uses accurate packet-level throttling when testing your site, instead of the default simulation run by Lighthouse.

Static IP Addresses

Securely grant access to DebugBear based on the request IP address.

Make Sense of Your Data

See What Changed

DebugBear breaks down what caused a change in your metrics. Break down performance data and what Lighthouse audit caused your score to drop.

Bundle Size Monitoring

Keep track of the size of your JavaScript bundles - even if the file hash or version number changes.

Compare Results for Different Pages

See how you compare to your competitors, or how page speed differs between Japan or Brazil.

Chart Annotations

Mark website deployments or content changes in your metric timelines.

Monitoring data

Web Vitals

Keep track of Largest Contentful Paint, Cumulative Layout Shift, and Total Blocking Time.

Google CrUX Data

Track the real-user metrics Google uses as a ranking signal. DebugBear collects URL-level data from the Chrome User Experience Report.

Console Output

View errors, warnings, and debugging logs emitted by your page.

Request Waterfall

View a waterfall chart of requests made during a test. Identify changes like new resources or failing compression.

Filmstrip and CPU Timeline

See and compare when different parts of your page were first rendered. Match this information against CPU tasks, to see how to speed up rendering.

Optimize Your Website

Site Speed Experiments

Test the impact of site speed optimizations without deploying changes to your website.

Anti-flicker Snippet Detection

DebugBear detects when A/B testing tools slow down your website.

Lighthouse Reports

DebugBear is built on top of Lighthouse, and every performance result includes a full Lighthouse report.

Resource Hint Validation

See if resource hints like preconnect and preload are set up correctly.

Alerts and Notifications

Automated but Configurable

DebugBear will automatically detect changes to your website and decide if you need to be notified. Or you can customize your settings to get just the most important alerts.

Weekly Summary Email

Keep track of how metrics have been changing across your whole website.

Performance Budgets

Set up thresholds that will be used to decide when an alert is sent. CI builds will fail if a budget is breached.

Email, Slack, or Teams

Subscribe to alerts by email, or share them with your team via Slack or Microsoft Teams.

API

Trigger Page Tests

Run tests as needed, or after a deployment to your staging server.

Automate Monitoring Setup

Set up monitoring for hundreds of pages at once.

Webhooks

Send test results to your server and store metrics in your own database.

Export Monitoring Metrics

Download monitoring data and import it into your internal systems.

Integrations

GitHub

Report the performance impact of your changes as part of the pull request.

Vercel

Automatically test each preview deployment before it goes live.

Advanced Features

Reduce Variance between Tests

Run each test multiple times and save the median result.

Inject Custom Code

Run JavaScript on the tested page, whether to close a GDPR popup, or to click a button that opens a modal.

Test Warm Loads

Test how fast your pages load when a user visits them a second time.

Account Management

Multiple ProjectsPro

Set up different projects and share them within your company or with external clients.

Shareable Links

Generate a unique link to grant access to everyone that needs it, without having to sign up.