Speedtest

The speedtest measures your internet speed through realistic data transfers: Step 1: Ping measurement – Your browser sends 10 requests to the server and measures response times in milliseconds. Average and jitter are calculated from the values. Step 2: Download test – The server sends 10 MB test data, your browser receives it and measures the time. Multi-phase technology performs multiple measurements and eliminates outliers. Step 3: Upload test – Your browser sends 5 MB test data to the server, transfer time is measured. Step 4: Analysis – All values are compared with German average values, your connection type is recognized and recommendations for gaming/streaming are generated. Accuracy: Real byte counting instead of extrapolations ensures 99%+ precise results.

Actual speed can differ from the plan for several reasons: WLAN vs. cable: WLAN connections are 30-50% slower than cable due to interference, walls, and distance. Test via LAN for accurate values. Network load: Multiple devices share bandwidth – downloads, streaming, or updates reduce your available speed. Peak hours: Evenings (6-10pm) lines are overloaded – 20-40% lower values are normal. Hardware limits: Old routers (802.11g), outdated network cards, or 100 Mbit LAN ports limit speed. "Up to" plans: Providers don't guarantee minimum speed – line quality and distance to distribution box affect DSL speed. Server distance: Tests on distant servers show lower values.

These four values characterize your internet connection: Download (Mbps): Speed when receiving data – crucial for streaming, webpage loading, downloads. 25 Mbps for 4K, 50+ Mbps for 8K. Upload (Mbps): Speed when sending data – important for video calls, cloud backups, livestreaming. 5+ Mbps for HD video calls. Ping (ms): Reaction time between your device and server – lower is better. <20ms optimal for gaming, 100ms problematic. Jitter (ms): Variation in ping time – measures connection stability. 10ms unstable (problems with video calls). Interplay: High download without low ping doesn't help gamers – all values are important.

Requirements vary by application: 4K streaming: Minimum 25 Mbps download per stream – Netflix recommends 25 Mbps, Amazon Prime 15 Mbps. With multiple 4K streams add the values. 8K streaming: 50+ Mbps download – not yet widespread, but future-proof. Online gaming: Only 5-10 Mbps download/upload sufficient, BUT: Ping <30ms ideal (<50ms acceptable), Jitter <5ms for stable connection. Competitive gaming: <20ms ping for FPS/MOBA, <10ms for fighting games – upload stability more important than bandwidth. Video calls: 5+ Mbps upload for HD (1080p), 10+ Mbps for 4K calls. Multiple usage: Add all simultaneous activities – family with 3x 4K streaming + gaming = 75+ Mbps download needed.

The test method significantly influences your results: LAN cable (recommended): Test via Ethernet directly at router for maximum accuracy. Eliminates WLAN interference and shows actual line speed. Ideal for provider complaints – documents maximum available speed. WLAN (reality test): Shows your practical everyday speed with all limitations. Often 30-50% lower values due to walls, distance, interference (neighbor WLANs, microwaves, Bluetooth). Test both: LAN shows if the line is the problem, WLAN test shows if router optimization is needed. Large discrepancy: LAN 100 Mbps, WLAN 30 Mbps? Optimize router position, change WLAN channel, or upgrade to 5 GHz / WiFi 6. Provider complaint: Only LAN tests are accepted.

Server selection influences your measurement results: Automatic selection: Chooses server with lowest ping – usually geographically closest server, shows best theoretical performance. Frankfurt (Germany): Optimal for German users – shows realistic speed for German websites and services. Amsterdam/Paris/London: Test European performance – relevant for cloud services with EU servers (AWS, Azure, Google Cloud). New York (USA): Test transatlantic connection – important for US gaming servers or American cloud services. Expect 20-50% lower values and higher ping. Test multiple servers: Different servers show if your routing problem is local or international. Gaming relevance: Test against servers in the region where your games are hosted (EU-West for LoL, US-East for many FPS).

The timing massively influences your results: Morning (6-9am): Low network load, highest speeds – baseline for maximum performance of your line. Noon (12-2pm): Moderate load, realistic average values – good indicator for daily performance. Evening (6-10pm = Prime Time): Highest load, lowest values – often 20-40% speed drop due to streaming/gaming. Most important test for everyday usage. Night (12-6am): Minimal load, maximum speed – shows if line fundamentally works. Test strategy: Conduct 3-5 tests per time window, calculate average. Use history: Compare tests over days/weeks – recognize patterns and document chronic problems for provider complaint.

Systematic troubleshooting in multiple steps: Immediate measures: Close all download programs (Torrents, Steam, Windows Update), stop streaming on all devices, disconnect unused devices from WLAN, test via LAN cable instead of WLAN. Router optimization: Restart router (disconnect 5 minutes from power), update router firmware, place router centrally and elevated (not in basement/closet), change WLAN channel (use WiFi-Analyzer apps), activate 5 GHz band instead of 2.4 GHz. Hardware check: Check LAN cable (Cat5e minimum, Cat6/Cat7 optimal), replace old routers (>5 years = upgrade sensible), update network drivers on PCs. Provider complaint: Document low values with screenshots over several days, contact provider with concrete data, demand performance reduction or tariff adjustment, check provider switch with chronic problems.

The speedtest automatically analyzes your connection and creates a detailed profile: Connection type recognition: Based on your measured values your connection is classified – Fiber/5G Ultra-Highspeed (500+ Mbps), Fiber/5G Highspeed (200-500 Mbps), VDSL/4G+ Fast (50-200 Mbps), DSL/4G Standard (16-50 Mbps) or DSL/3G Basic (<16 Mbps). Latency rating: Your ping is evaluated – Excellent (50ms = Gaming impaired). Stability check: Jitter analysis shows connection stability – Very stable (10ms). Usage recommendations: Automatic evaluation for 4K streaming, HD streaming, video calls and online gaming with status "Perfect", "Limited" or "Not suitable". Practical benefit: You immediately see if your connection is sufficient for your applications.

The history is a powerful tool for analysis and documentation: Automatic storage: Your last 20 tests are saved locally in the browser with date, time, server, and all measured values (download/upload/ping/jitter). Trend analysis: Compare tests over days/weeks – recognize if problems are constant, time-dependent, or sporadic. Decreasing values over months? Time to switch provider. Time comparison: Sort by time – prove that performance drops in evening (Prime Time problem). Server comparison: Test same server multiple times – document consistently low values for provider complaint. Provider complaint: Take screenshots of history – show recurring problems over 2+ weeks. Concrete data strengthens your position in complaints. After changes: Test before/after router upgrade, tariff change, or WLAN optimization – document improvements or prove problem is with provider. Clear history: "Clear history" button removes all saved tests.