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Internet speed test

Check your download, upload, ping and jitter in under a minute, right in your browser. Share your result as an image, or add the test to your own website for free.

About this test

A simple, fast and ad-free speed test. It measures your connection to the nearest Cloudflare server, shows ping under load (bufferbloat), tells you whether your connection handles 4K, video calls and gaming, and keeps a history of your results in your browser. For the most accurate result, test over a cable with other apps closed.

Add this speed test to your website

Free for any website. Copy the code and paste it into your page as HTML. No ads, no IP addresses collected.

Embed code

<iframe id="sz-speedtest-embed" src="https://internet.samzmieniam.pl/test?embed=1&lang=en" title="Internet speed test" width="100%" height="640" style="border:0;max-width:720px;border-radius:20px" loading="lazy" allow="clipboard-write; web-share"></iframe>
<p style="font-size:13px">Internet speed test by <a href="https://samzmieniam.pl/en/speed-test/">samzmieniam.pl</a></p>
<script>window.addEventListener('message',function(e){var f=document.getElementById('sz-speedtest-embed');if(!f||e.origin!=='https://internet.samzmieniam.pl'||e.source!==f.contentWindow||!e.data||e.data.type!=='sz-widget-height')return;var h=parseInt(e.data.height,10);if(h>200&&h<4000)f.style.height=h+'px';});</script>

The short script resizes the widget to fit; without it, the widget works at a fixed height. Please keep the credit line under the widget.

Preview

Privacy

If you leave the save box ticked, we store the result anonymously (speeds, ping, network, country) to publish aggregate statistics. We never store your IP address. Your test history stays in your browser. Details in our privacy policy (in Polish).

Wersja polska