READYReady for a controlled test
0%Pause downloads and streaming. Keep this device and browser unchanged between locations.
ROOM-BY-ROOM WI-FI DIAGNOSTIC
Find where your Wi-Fi slows down.
Compare the same device beside your router, in a problem room and over Ethernet. Get a clear, evidence-based diagnosis without installing an app.
Measurements stay in this browser · no registrationCONTROLLED TEST
Measure one location at a time
Download—Mbps
Upload—Mbps
Latency—ms
Jitter—ms
WI-FI DIAGNOSIS
Start beside the router
The first test establishes the strongest Wi-Fi result this device can reach.
Evidence
No baseline has been measured yet.
Next actions
1Stand close to the router without changing device.
2Pause background traffic and run the first test.
COMPARISON
Stored only in this browserYour saved locations
Beside router
Not tested- Download
- — Mbps
- Upload
- — Mbps
- Latency
- — ms
- Jitter
- — ms
Problem room
Not tested- Download
- — Mbps
- Upload
- — Mbps
- Latency
- — ms
- Jitter
- — ms
Ethernet baseline
Not tested- Download
- — Mbps
- Upload
- — Mbps
- Latency
- — ms
- Jitter
- — ms
WHAT THIS TEST CAN MEASURE
A controlled comparison, not a fake radio scan
Browsers can measure delivered throughput and request timing, but they normally cannot read your network name, radio channel, RSSI or neighboring access points. Use the same device and test endpoint in every location so the change between results is meaningful.
- 1Start beside the routerEstablish the best Wi-Fi result this device can reach.
- 2Move to the problem roomKeep the device, browser and background traffic unchanged.
- 3Add Ethernet when possibleRemove the wireless link and isolate the ISP-facing baseline.
Wi-Fi analyzer questions
Can a website see my Wi-Fi signal strength or channel?
No. Standard browser APIs do not expose SSID, channel, RSSI or nearby networks. This analyzer measures browser-visible network performance and compares controlled tests instead of inventing radio data.
How do I tell whether weak Wi-Fi is the problem?
Run one test beside the router and another in the room where the problem occurs, using the same device. A large drop in throughput or increase in latency variation points toward the local wireless link.
Why should I add an Ethernet baseline?
Ethernet removes the Wi-Fi radio link from the comparison. If Ethernet performs well while both Wi-Fi tests are poor, the wireless network is the likely bottleneck.
Does this replace a native Wi-Fi scanner?
No. A native scanner can inspect channels, RSSI and nearby access points. This tool focuses on the real browser-level performance delivered to your device.