Download
How many megabits per second you receive. It drives video quality, file downloads and how fast pages open.
Internet Speed Test
Check your real connection speed: in about 25 seconds we measure download and upload in Mbps, ping and jitter, then explain in plain words whether it is enough for 4K video, video calls and online gaming. We also show latency to LiMP servers.
The test runs from your browser to our server. We do not store results: the history of your last five tests stays on your device only.
—Mbps
Press “Start”. The test measures ping, then download and upload speed. It takes about 25 seconds and uses up to roughly 125 MB of data, which matters on a limited mobile plan.
Download—
Upload—
Ping—
Jitter—
Your recent tests
Your last five tests will appear here. They are stored in this browser only.
For an accurate result, pause downloads and video on other devices and run the test a couple of times. Wi-Fi is almost always slower than a cable.
We do not store results or log your IP address: it is only used for the limit of 10 tests per hour. ISP and city come from a local database on our server.
What the test shows
Four numbers describe a connection: how much data it carries in each direction and how quickly and steadily it responds.
Upload
How much you can send. It matters for video calls, streaming, cloud backups and sending large files.
Ping
Server response time in milliseconds. Low ping matters for games and calls where reaction time counts.
Jitter
How much latency jumps between requests. High jitter means choppy voice and stutter in games.
When it helps
Check your ISP plan
Compare the advertised speed with the real one at different times of day and on different devices.
Find Wi-Fi weak spots
Run the test next to the router and in a far room to see whether you need a mesh point or a cable.
Before a call or a match
Make sure ping and upload are enough, and tell whether the problem is your connection or the service.
More LiMP tools
Free network, privacy and security checks right in your browser — no install, no sign-up.
- Is my VPN working
- Is a site down for everyone or just me
- Website availability from different countries
- Internet stability test
- Password generator
- Password strength and leak check
- Email breach check
- Link and website phishing check
- DNS leak test
- Wi-Fi security check
- Dependency audit & SBOM
- My IP address & footprint
How an internet speed test works
A speed test is a controlled data transfer between your device and a test server. First, the browser sends a series of short requests and uses the response time to calculate ping and jitter. Then several parallel streams download random data from the server, and we count how many megabits arrive per second. The last stage is upload: the browser sends data to the server and we measure megabits per second the same way.
The first second and a half of each stage is not counted, because a connection needs a moment to ramp up and including that would understate your speed. Parallel streams are used for the same reason: a single stream rarely fills a fast line. The data is random and incompressible, so neither the browser nor the network can inflate the result with compression.
We do not use third-party public test servers: the test runs on LiMP's own infrastructure. The result therefore shows your speed to our server. Speed to other websites can differ because of routing, distance and the load on each service.
How much internet speed do you really need
- Websites, email and messaging — 3–5 Mbps is enough; low ping matters more.
- Full HD video — about 5–8 Mbps per screen.
- 4K video — 25 Mbps or more per screen; two 4K TVs need 50 Mbps or more.
- HD video calls — 3–4 Mbps in both directions, ping under 100 ms and jitter under 30 ms.
- Online gaming — little bandwidth, but ping ideally under 50 ms and jitter under 15 ms.
- Streaming and large cloud uploads — 20 Mbps upload or more.
Why your speed is lower than your plan
Your ISP advertises the maximum speed to its own network, not a guaranteed speed to every website. Real speed is almost always lower: protocol overhead takes part of the line, the ISP network is busier in the evening, and the route to a server crosses several other networks.
The most common cause of a low result is Wi-Fi. Walls, distance to the router, neighbouring networks on the same channel and older Wi-Fi standards can easily cut speed in half or more. If a cable gives you the plan speed and Wi-Fi does not, the problem is the wireless network: try the 5 GHz band, move the router or add an access point.
Your device and browser matter too. An older phone or a laptop in power-saving mode may not keep up with speeds above 300–500 Mbps. For an accurate result, close other tabs, pause downloads and run the test two or three times.
Ping, jitter and latency to LiMP servers
Ping is the number of milliseconds between a request and its response. Jitter is how much that ping changes from one request to the next. For calls and games a steady 60 ms is better than ping jumping between 20 and 150 ms. To dig deeper into stability and packet loss, run the separate internet stability test.
The “Latency to LiMP servers” block shows the round-trip time from you to our servers. When you connect through a VPN, the path to the chosen server is added to your ping, so the lowest latency in this list tells you which location to pick in the LiMP app. We show the numbers as they are: if a server is far away, latency will be higher.
Internet speed FAQ
On most connections up to 300–500 Mbps a browser test is close to dedicated apps. Wi-Fi, other downloads on the network and a slow device reduce accuracy. Run the test two or three times and go by the average.
Each service measures speed to its own server. Distance, routing and server load differ, so a 10–20% difference is normal. Our test shows speed to LiMP's infrastructure.
Up to 100 MB of download and 25 MB of upload per test, and much less on slow connections. On a small mobile data plan, avoid running it many times in a row.
Most home and mobile plans are asymmetric: upload is several times lower than download. Fibre plans often have equal speeds.
Under 30 ms is excellent, under 60 ms is good for gaming and calls, under 100 ms is fine for calls. Above 150 ms the delay becomes noticeable in conversation.
Any VPN reduces speed a little and adds latency, because traffic is encrypted and goes through an extra server. The closer the server and the wider its channel, the smaller the loss. You can see latency to LiMP servers right in the test results.
No. Results are calculated in your browser, and the history of the last five tests is kept only in localStorage on your device; you can clear it with one click. Your IP address is used only for rate limiting and is not logged.