In-depth Web Performance Reports You Can Trust

Real network throttling

Lighthouse and PageSpeed Insights use simulated throttling to test your website. The data is actually always collected on a fast connection!

DebugBear actually slows down the network instead of relying on a simulation that's often inaccurate.

Avoid random outliers and false alerts

DebugBear always repeats tests before sending an alert, so you don't have to deal with issues you can't replicate.

Over 70 different metrics

We track everything from Web Vitals to Lighthouse scores and page weight. We also provide debug data for each metric to help you improve it.

Easily filter data to focus on what you need

Want to optimize the Largest Contentful Paint? No problem! We'll show you the responsible DOM element and what network requests you need to speed up.

Industry-leading request waterfall

What requests are render-blocking? Are any resources preloaded? Does the LCP image use the fetchpriority attribute? How is bandwidth allocated across requests?

Our waterfall chart shows all of this information and puts it into context.

Understand metric changes with ease

Wondering why your LCP went up? Simply click on the regression in the chart to see what changed between the two test results.

Set up performance budgets

Configure custom alert thresholds and make sure your pages stay in budget.

Synthetic testing

Run tests in controlled lab environment and get in-depth reports.

Real user monitoring

See how fast your website is for real users, and what you can do to optimize it.

Google CrUX data

Real user data from the Chrome User Experience Report.

Front-end monitoring alerts

Send alerts by email, in Slack, or in Microsoft Teams.

API and webhooks

Trigger page tests with the API and save test results to your own infrastructure.

Integrate with GitHub, Vercel, and Netlify

Catch regressions early by testing every pull request an CI.

Export monitoring data

Download metrics as CSV or JSON.