How this packet loss test works
This packet loss test sends small real-time packets between your browser and a WebRTC test server. It records how many packets return, how long they take, and how much timing varies during the run.
Online packet loss test
Packet Loss Test
Run a free online packet loss test in your browser. This WebRTC packet loss test checks upload packet loss, download packet loss, latency, jitter, and late packets for gaming, video calls, streaming, and real-time apps.
Packet loss test console
Ready for packet loss test
Ready
Start the packet loss test and the key numbers update here without leaving the first screen.
Sent
0/150
Received
0
Live latency
N/A
Live jitter
N/A
0.0 sec elapsed
No download required. This packet loss tester calculates results from real packets.
Packet Loss Test Settings
Choose a packet loss test preset or tune the packet profile for your connection.
Size of each test packet.
bytes
64 bytes1200 bytes
Packets sent per second.
pps
1 pps100 pps
How long the recorded test runs.
sec
5 sec120 sec
Packets above this round-trip time are marked late.
ms
50 ms1000 ms
Connection settling time before recording packets.
sec
0 sec5 sec
Auto is enabled for v1.
Live packet path
Browser to test server and back
WebRTC
Packet loss test online
Online packet loss test for unstable internet, games, and video calls
PacketLossTest.dev is a browser-based packet loss test for checking packet loss, ping-style round-trip latency, jitter, and late packets. Use this online packet loss test when a normal speed test looks fine but real-time apps still lag, stutter, freeze, or drop audio.
What is packet loss in a packet loss test?
Packet loss means some data packets never reach their destination. A packet loss test makes that visible by comparing packets sent, packets received by the server, and packets echoed back to your browser.
What is a good packet loss test result?
A good packet loss test result is 0% packet loss with low latency and low jitter. Anything above 1% can be noticeable in competitive games, voice calls, and video meetings.
Gaming packet loss test
Use the Gaming preset as a gaming packet loss test when you see lag spikes, rubber-banding, delayed hit registration, or unstable voice chat.
What causes packet loss test failures?
A packet loss test can fail because of Wi-Fi interference, overloaded routers, damaged cables, congested ISP routes, VPN issues, or busy remote servers.
How to fix packet loss after a packet loss test
After a packet loss test shows loss, test with Ethernet, restart network gear, reduce local traffic, update router firmware, remove VPNs, and compare results across server regions.
Explore packet loss test guides
These packet loss test guides cover related search intents for jitter, ping, latency, gaming packet loss, and troubleshooting packet loss after a failed test.
FAQ
Packet loss test FAQ
How does this packet loss test work?
This packet loss test sends real-time WebRTC packets between your browser and a test server. It compares sent packets, server-received packets, and echoed packets to calculate upload packet loss, download packet loss, total packet loss, latency, and jitter.
What is packet loss?
Packet loss happens when data packets traveling across a network fail to reach their destination. A packet loss test can reveal why games lag, calls break up, and real-time apps feel unstable.
Is 1% packet loss bad?
For browsing, 1% packet loss may not be very noticeable. For competitive gaming, voice calls, and video meetings, a packet loss test result of even 1% packet loss can cause problems.
What causes a packet loss test to fail?
Common causes include Wi-Fi interference, overloaded routers, bad cables, congested ISP routes, VPN issues, and server-side network problems.
How do I fix packet loss after a packet loss test?
Try Ethernet instead of Wi-Fi, restart your router, reduce local network load, update firmware, test without VPN, and contact your ISP if packet loss continues across multiple services.
Why do I have packet loss but good speed test results?
A speed test measures bandwidth. A packet loss test measures stability. Download speed can be high while packet loss, latency spikes, or jitter still make the connection unstable.
Is this online packet loss test accurate?
The online packet loss test uses WebRTC DataChannel packets to approximate real-time UDP-like traffic in the browser. Results depend on browser support, the chosen server region, and current network conditions.
Can I use this as a gaming packet loss test?
Yes. Use the Gaming preset when you want a gaming packet loss test for lag spikes, rubber-banding, delayed hit registration, or unstable in-game voice chat.