Frontend Native JavaScript Monitoring

How it works

TrackJS is a frontend native error monitoring tool: private by default, zero page impact, and compatible with every browser and framework. Track errors from code bugs, network failures, and third-party scripts across your real users.

1. Add the TrackJS agent

Copy the code into your html or bundle it from npm. The agent is only 8 kilobytes, has no dependencies, and runs without slowing down your pages or recording sensitive user data.

2. Deploy your site

Now that the agent is part of your site, TrackJS automatically monitors errors from your real users in your production environment. Unhandled errors, rejected promises, failing network calls, and console errors are all captured by the agent automatically.

3. Create filters and alerts

Everyone's site has JavaScript errors, but not all of them matter. TrackJS gives you powerful filtering tools to focus on the errors that affect your most important users.

Private by default

The agent captures only what's needed to reproduce and fix errors. No cookies, no identifiable user profiles, no session recordings.

No impact

The TrackJS agent runs in a background buffer with no changes to page behavior. Your pages perform exactly the same with or without monitoring.

Non-blocking

Error data is delivered asynchronously so it never interrupts your users. If our servers are unavailable, your site keeps running without any impact.