Performance

How fast does your website load?

We measure response time, page weight, caching and rendering blockers of your start page and show the Core Web Vitals. Every finding comes with a concrete recommendation.

Everything in one report, on a schedule if you like

With an account you check e-mail, security, performance and SEO in one step and get a mail when something changes.

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The guide to performance

What the findings mean and how to fix them, in the same categories as the report. Or straight to a topic:

Server and network Page weight Rendering Caching Core Web Vitals

What makes a website fast?

Three things: a server that answers fast, a page that transfers little, and a structure that does not keep the browser waiting. The Core Web Vitals (LCP, INP, CLS) measure how that feels to visitors: when the content is there, how fast the page reacts and whether anything jumps.

bytereport fetches your start page like a browser, only without rendering it: it measures the response time, loads the files the HTML names and looks at what slows the build, how large it is and how long browsers may keep it. That is visible without Google.

The Core Web Vitals themselves are measured by Google PageSpeed Insights: real user data from Chrome if the page has enough visitors, otherwise a lab measurement with Lighthouse. The operator of the instance switches this on; the checked address then goes to Google.

More with an account

Without signing up you can run single checks. With an account you check everything more thoroughly in one step, regularly and with explanations by AI.

Combined report: all checks for one domain in one step, with a score per check.
Schedules repeat the combined report and report changes by mail.
Send test mails, and we check whether and how your real e-mail actually arrives.
Test the visibility of your websites in different AI models; before every run you see what it costs in credits.

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