Browser-based test
Internet speed test
Check download speed, upload speed, ping, and jitter in one pass, then use focused guides to diagnose gaming lag, slow Wi-Fi, mobile data issues, and unstable video calls.
Test Your Internet Speed
Measure your connection's download speed, upload speed, and latency
Optional context is saved with recent results and included only if you copy a share link.
Low-data measurement
Active because the browser cannot report connection quality. The time- and byte-bounded run requests at most about 52 MiB of test payload, and usually less. Protocol overhead may add a little more.
Test endpoint
Default Server - Nearest Location
Same-origin hosted endpoint
Endpoint readiness unavailable
Default endpoint is ready.
For the most accurate results, close other apps and devices using your network
Browser-based spot check
The result reflects your device, browser, local network, and the route to the current hosted test endpoint.
Best for comparison work
Use it before and after changes like moving the router, switching to Ethernet, or pausing background traffic.
Not a certified audit
Results can differ from ISP marketing claims and other speed test providers because the infrastructure and method are different.
Read the result correctly
Treat this as a real-world check, not a perfect lab number. Browser tests are affected by Wi-Fi quality, device limits, background traffic, and how far your traffic travels to the current hosted test endpoint.
Choose the problem
Use the speed test for the issue you actually have
The raw result is only the first step. These guides turn the numbers into decisions for narrower, more actionable use cases.
WiFi speed test for gaming
Check whether ping, jitter, and upload are strong enough for competitive play and voice chat.
Internet speed test for streaming
Compare your result against HD and 4K streaming needs before blaming the TV or app.
Internet speed test for work from home
Use call-ready upload, ping, and jitter targets for Zoom, Meet, Teams, and remote desktops.
Why is my internet so slow?
Run the right tests first, then separate Wi-Fi issues from ISP-side slowdowns and congestion.
Wi-Fi vs Ethernet speed comparison
Compare the same line over wireless and wired connections to find the real bottleneck.
Mobile internet speed tests
Measure 5G or LTE properly, avoid Wi-Fi mix-ups, and judge whether your phone result is actually good.
Better measurements
How to get a cleaner speed test result
If you want useful numbers, control the obvious noise first. The most valuable comparison is usually Wi-Fi versus Ethernet on the same device.
Compare Wi-Fi and EthernetPlan before you upgrade
Calculate the speed your household actually needs
Combine simultaneous streaming, gaming, video calls, remote work, and uploads. Get a practical download, upload, ping, and jitter target with operating headroom.
Read the numbers
Best next guides after the test finishes
These pages help you decide whether you are dealing with a weak Wi-Fi room, an internet-plan gap, gaming latency, mobile data limits, or unstable video calls.
Use open internet performance data
Download the versioned rules and provider-footprint records behind the tools as current JSON, reusable CSV, or immutable releases.
Share or download one result
Open the native share sheet, save a privacy-safe PNG card or structured JSON record, and understand why editable result links are not signed proof.
Use a provider-specific test workflow
Pre-fill Xfinity, Spectrum, AT&T, Verizon, T-Mobile, Cox, CenturyLink, Frontier, Optimum, or Starlink context and follow access-specific checks.
Track internet performance over time
Turn up to 100 private local results into trend charts, medians, p10-p90 spread, time-of-day summaries, and portable evidence.
Compare measured speed with your plan
Aggregate eligible saved runs by median, compare advertised and label-typical values, and export an evidence-aware support summary.
Compare before and after results
Select two measured runs, screen meaningful changes, and review endpoint, connection, method, and time-window cautions.
Test real-world internet quality
Use one measured run to check gaming, video-call, 4K-streaming, and large-upload readiness.
Test connection stability
Watch browser RTT over 15–60 seconds and inspect p95 latency, jitter, spikes, and application-probe misses.
Test latency under load
Compare idle, download-loaded, and upload-loaded latency with a transparent bufferbloat grade.
Understand speed test results
Learn what download, upload, ping, and jitter mean together instead of reading one number in isolation.
What is a good speed test result?
Match your result to realistic benchmarks for households, streaming, gaming, and uploads.
Good speeds by activity
See how much download and upload you really need for browsing, backups, gaming, and streaming.
FAQ
Internet speed test questions
- What does this speed test measure?
- SwiftSpeedTest measures download speed, upload speed, ping, and jitter from your browser to its hosted test infrastructure. Results can vary with Wi-Fi quality, device limits, browser behavior, background traffic, and network distance.
- How do I get a cleaner result?
- Close big downloads, pause cloud backups, test near the router or on Ethernet, and repeat the test in the same spot before comparing results.
- What is a good speed test result?
- There is no single good result for every home. Add the versioned planning requirements for activities that can happen at the same time, then compare repeated idle and loaded results with each application's current requirements.
- Can this test help diagnose slow internet?
- It can narrow the possibilities. Compare the same device and endpoint on Wi-Fi versus Ethernet and during quiet versus busy periods; those controlled differences provide evidence, but one browser result cannot prove the exact layer at fault.
- Why can one test look good and another look bad?
- Different tools use different servers and methodologies. Even on the same site, background traffic, Wi-Fi interference, router load, and peak-hour congestion can change the result.
Trust notes
SwiftSpeedTest is strongest as a fast troubleshooting tool: retest after router moves, compare Ethernet and Wi-Fi, or check whether gaming, streaming, and calls are suffering from low upload or unstable latency.
If you need a deeper explanation of methodology and limitations, read the how it works page before comparing this result against another testing service.