Your test

Download, upload, ping and jitter between your device and the Lodestar server. Results depend on your connection, device and the route to our server. Wi-Fi, mobile signal and other network activity can affect the measurement.

How it works

The test checks latency, then download and upload. It uses 32 parallel download and upload streams and takes around 30 seconds. Tests can use hundreds of MB of data. You can stop at any time.

Browser stress test

Use Stress test to keep traffic running continuously for 1, 5, 10 or 30 minutes, or 1, 2, 4, 6, 8 or 12 hours. Choose download, upload or both, with 4 to 96 total parallel streams (32 by default). Download + upload runs both directions at once and shares the streams equally: 96 streams means 48 downloading and 48 uploading. More streams may help fill a fast link, but can also reduce performance on busy connections. If the server is busy, the stress test reduces its stream count and retries while continuing the session. Speeds update every second, with loaded ping and jitter measured while traffic runs. The session shows average and peak speeds, data totals, a chart of the last 120 seconds and details of any test errors. Your last stress session is saved in this browser separately from History.

Stress tests can transfer many GB and use all available bandwidth, affecting other devices and applications. You can use other tabs while the browser keeps the test page active. The test ends when the timer expires, you press Stop, you close or reload the page, or the browser goes offline. Sleep or browser tab suspension may interrupt it. Averages cover the full session and peaks use one-second readings. Data totals show network traffic, not files saved to your device. Download data is discarded after each request; only the readings and error details are saved in this browser. Uploaded data estimates what the browser has sent.

Your history

Your last 20 completed tests are saved in this browser. Use History to view or clear them. There are no accounts, ads, analytics or ISP lookups. Generated upload data is discarded, and results are not stored on the server. The gateway processes your connection address to respond.

Android app

LSN Speedtest uses this public server and saves results on your phone. The Connection section shows available mobile or Wi-Fi details. Stress tests can repeat for 10, 30 or 60 minutes and continue while the phone is locked, with a Stop notification. Android 8.0 or later is required.

Download LSN Speedtest

Version 1.6.0

Built on LibreSpeed

Speedtest engine by Federico Dossena and LibreSpeed contributors, licensed under GNU LGPL version 3 or later. Lodestar branding and interface are customised for this service.

JavaScript engine copyright © 2016–2024 Federico Dossena. Go backend v1.1.6 copyright © 2020 Maddie Zhan and contributors.