Page Speed Advisor ioriver.io

Free page load analysis

See why your page loads slowly

We load your page in a real browser, capture every request, and review the waterfall. You get concrete fixes: preload, preconnect, Early Hints, priorities and more.

Desktop Chrome · cold cache · usually done in under a minute

Free website speed test with AI recommendations

Page Speed Advisor by IO River shows why a page loads slowly and what to change, based on a real browser load rather than a synthetic score.

How it works

  1. Enter a public URL. The page is loaded in desktop Chrome with a cold cache.
  2. Every request is recorded in a HAR file, along with FCP, LCP and CLS.
  3. Deterministic checks find caching, compression, priority and render-blocking problems.
  4. AI reviews the waterfall and returns prioritised, ready-to-use fixes.

What it checks

  • Largest Contentful Paint discovery and priority
  • Preload, preconnect, dns-prefetch and 103 Early Hints
  • Browser and CDN caching headers
  • Compression (Brotli, gzip) and HTTP protocol versions
  • Render-blocking CSS and JavaScript, critical request chains
  • Image loading, fetchpriority and dimensions
  • Third-party requests and their weight

Frequently asked questions

What does Page Speed Advisor check?

It loads your page in desktop Chrome with a cold cache, records every request, and measures First Contentful Paint, Largest Contentful Paint and Cumulative Layout Shift. It then checks caching, compression, resource priorities, render-blocking assets and third-party weight.

How does the AI review work?

A condensed summary of the request waterfall is reviewed by AI, which returns concrete fixes such as preload hints, preconnect, Early Hints, fetchpriority and caching changes. AI suggestions can be wrong, so test changes before shipping them.

Is Page Speed Advisor free?

Yes. It is a free tool from IO River. No account or sign-up is needed, and the number of analyses per visitor is limited to keep it available to everyone.

Do you store my results?

Analyses and HAR files are kept for one hour and then deleted. Sensitive headers and cookie values are removed from the HAR.

Why are my results different from other speed tests?

Each result is a single cold-cache load from one location, so numbers vary with server location, network conditions and page variability. Use the results to find the biggest opportunities, not as exact benchmarks.