Internet Speed Test
This measures download speed and latency between your device and olltools.com's own server (or its CDN) — not a neutral, multi-server benchmark like Ookla or Fast.com. Results depend on your distance to the host, browser and Wi-Fi. A test file can under-measure very fast connections. There is no upload test. A run downloads roughly 5 to 65 MB.
- Peak
- --
- Latency
- --
- Jitter
- --
- Data used
- --
Check your download speed, latency and jitter in one click, with no ads, no signup and no app. The test downloads random files from OllTools' own server, so it shows your connection to this site rather than acting as a neutral multi-server benchmark. It reports the median and peak of several runs, places the result on a gauge, and tells you in plain words what the speed is enough for.
How it works
- Click Start test: the page measures latency with a handful of tiny requests, then warms up with a 1 MB file
- Slower connections are measured with four 1 MB downloads; faster ones with three rounds of two parallel 10 MB downloads, so the test file is large enough to matter
- The median of the runs is your download speed, shown with the peak, latency, jitter, data used and a plain-language hint about what the speed handles. You can stop any time
Frequently asked questions
How accurate is this speed test?
It accurately times how fast your device downloads test files from olltools.com's server or CDN, but that is not the same as your maximum line speed. Distance to the server, CDN load, your browser, Wi-Fi quality and other devices on your network all change the result. Treat it as one sample and run it a few times.
Why is the result different from Speedtest by Ookla or Fast.com?
Those services test against many servers, some hosted inside ISP networks or Netflix's CDN, and use several parallel connections. This test uses one origin and at most two parallel streams, so numbers can differ, especially on very fast connections.
Can it measure gigabit connections?
Only roughly. The largest test file is 10 MB, which a gigabit connection downloads in well under a second, so ramp-up time keeps the result below the true line speed. For a plan above a few hundred Mbps, use a dedicated tool and treat this one as a lower bound.
Is there an upload test?
No. Measuring upload needs a server endpoint that accepts data, and this tool is deliberately client-only. Only download throughput, latency and jitter are measured.
How much data does a test use?
About 5 MB on a slow connection and up to roughly 65 MB on a fast one. Avoid running it repeatedly on a metered mobile plan.
What are latency and jitter?
Latency is the median round-trip time for tiny requests to this server, in milliseconds. Jitter is the average change between consecutive latency samples; a low number means a steady connection, which matters more for calls and gaming than raw Mbps.
Why does the test stop or show an error?
The test gives up if no data arrives for 8 seconds or the whole run exceeds 60 seconds, so it never hangs. An error usually means the connection dropped or a blocker interfered; try again.
Is Mbps the same as MB/s?
No. Mbps is megabits per second and MB/s is megabytes per second. Divide Mbps by 8 to estimate MB/s, so 100 Mbps is about 12.5 MB/s.
Related tools
From the blog
Update history
- 2026-10-03 Added links to related tools.
- 2026-09-21 Launched: client-side download speed, latency and jitter test against OllTools' own server, adaptive test size, median and peak of several runs, log-scale gauge, stop button and timeouts, and a shareable certificate — no ads, signup or app.