Why is there no packet loss figure?

Because a browser cannot measure it: the underlying protocol retransmits lost packets before the page ever sees them. Showing "0%" would be an invented number — this test shows interruptions of the flow instead, which are measurable.

Why does the test ask whether I am on Wi-Fi or mobile data?

Because browsers almost never expose the real link type, and guessing gets it wrong. Declaring it lets the diagnosis keep only the advice that applies to you — no "move closer to the router" when you are on mobile data.

My latency is high but everything works — is my line bad?

Not necessarily. The distance to the test server accounts for a large share of latency. A high but steady response time usually points to distance, not to a faulty line — the diagnosis takes that regularity into account.

What is latency under load?

The response time measured while a download is running. It is what makes video calls stutter as soon as someone else on the connection downloads — and a classic speed test does not show it.

Are the results comparable with other speed tests?

Only roughly: server location and load differ from one tool to another. The most useful comparison is with your own previous runs, kept in your local history.

What data is stored or sent?

The history stays on your device. Your IP address is not displayed or logged, and the test traffic is random bytes with no personal content.

Yes — no account, no signup, and no limit on how often you rerun it.

Internet Speed Test with an Honest Diagnosis

This internet speed test measures your connection in a few seconds — download speed, response time, jitter, interruptions, and responsiveness under load, the number that explains video calls breaking whenever someone downloads. It then tells you, in plain language, what is wrong, where it probably comes from — Wi-Fi, router, provider, or simply the distance to the server — and what to do next, including a retest right next to the router. No account, and no invented numbers: what could not be measured is written as such.

Comment va votre connexion ?

Analysez votre connexion Internet en quelques secondes et découvrez ce qui peut ralentir votre réseau — avec, pour chaque chiffre, ce qu’il permet de faire.

Une question avant de commencer

Comment êtes-vous connecté ? Aucun navigateur ne sait le détecter de façon fiable, et la moitié des conseils en dépend.

Environ 15 secondes. Le test télécharge et envoie des données réelles — comptez une dizaine de mégaoctets sur votre forfait.

À savoir avant de lire les résultats

La perte de paquets n’est pas mesurable depuis un navigateur.
Le type de connexion est celui que vous indiquez, aucun navigateur ne le détecte.
Le serveur de test est sur un autre continent : sa ville réelle est affichée avec le résultat, et la distance compte dans le temps de réponse.

How to test your connection in 3 steps

Launch the test
A few seconds of real measurements. The test data is random bytes, so compression cannot inflate your speed — the number you see is the line, not a trick.
Read the diagnosis
Every value carries its source, and the probable causes are ranked from most to least likely — always as probabilities, because no test can name a culprit with certainty.
Compare and act
Follow the suggested actions, retest right next to the router to see whether the Wi-Fi is at fault, and watch your history over time — it stays on your device.

Why use this speed test

No invented numbers

Packet loss cannot be measured from a browser, so this test says so instead of showing "0%". Anything that could not be measured is written, never replaced by a zero.

A cause, not just numbers

Wi-Fi, router, provider or plain distance to the server: the likely causes are ranked and explained, each with a way to verify it.

Latency under load

Good speed but choppy calls? The test measures response time during a download — the number classic speed tests skip, and the one that explains most call drops.

Your data stays yours

The history is stored on your device only, your IP address is not logged or displayed, and the transferred data is random bytes generated for the test.

Frequently asked questions

Why is there no packet loss figure?: Because a browser cannot measure it: the underlying protocol retransmits lost packets before the page ever sees them. Showing "0%" would be an invented number — this test shows interruptions of the flow instead, which are measurable.
Why does the test ask whether I am on Wi-Fi or mobile data?: Because browsers almost never expose the real link type, and guessing gets it wrong. Declaring it lets the diagnosis keep only the advice that applies to you — no "move closer to the router" when you are on mobile data.
My latency is high but everything works — is my line bad?: Not necessarily. The distance to the test server accounts for a large share of latency. A high but steady response time usually points to distance, not to a faulty line — the diagnosis takes that regularity into account.
What is latency under load?: The response time measured while a download is running. It is what makes video calls stutter as soon as someone else on the connection downloads — and a classic speed test does not show it.
Are the results comparable with other speed tests?: Only roughly: server location and load differ from one tool to another. The most useful comparison is with your own previous runs, kept in your local history.
What data is stored or sent?: The history stays on your device. Your IP address is not displayed or logged, and the test traffic is random bytes with no personal content.
Is it free?: Yes — no account, no signup, and no limit on how often you rerun it.

Internet Speed Test — With an Honest Diagnosis