See your internet clearly. Fix it faster.
Deep Diagnostics
Bufferbloat grading, jitter & stability analysis
AI Insights
Personalized tips to improve your connection
Privacy First
No tracking, no login required. Open source.
How Lumina Works
How is Lumina Different
Most speed tests just show you numbers. Lumina gives you the full picture — with insights, privacy, and real-world context.
| Feature | Lumina | Others |
|---|---|---|
Bufferbloat Grading | ||
AI-Powered Troubleshooting | ||
Privacy-First / No Tracking | ||
Real-World Experience Scoring | ||
No Login Required | ||
Open Source & Free | ||
Download & Upload Speed | ||
Ping & Jitter Test |
Server Comparison
Test against multiple servers to compare latency and routing quality.
Achievements
0/8 unlockedRun at least 2 tests to see trends
Internet Speed Test — Understand Your Connection
Lumina is a free, privacy-first internet speed test that measures your download speed, upload speed, ping (latency), and jitter with clinical precision. Unlike basic speed tests, Lumina goes deeper — grading your connection for bufferbloat (the hidden cause of lag under load), scoring real-world performance for gaming, 4K streaming, video calls, and remote work, and providing AI-powered recommendations to fix common issues. No login required. No data sold. Your results stay on your device.
Free Speed Test with Real-World Scoring
Whether you're on fiber, DSL, cable, or WiFi, Lumina gives you an accurate broadband speed test in under 30 seconds. Check your internet speed with download and upload measurements in Mbps, measure ping and jitter for latency testing, and get a bufferbloat grade that reveals how your connection performs under load. Our WiFi speed test works on any device — phone, tablet, or desktop.
The Best Ookla & Fast.com Alternative
Looking for a Speedtest alternative that does more than just show numbers? Lumina is a fast speed test with AI-powered troubleshooting, multi-server comparison, and real-world experience scoring for gaming, streaming, and remote work. Our bandwidth check includes bufferbloat detection — something most online speed tests ignore. It's a quick speed test that actually helps you understand and improve your internet quality. Free, open source, and no account needed.
How to Check Your Internet Speed
Simply click "Start Test" to run a complete network speed test. Lumina measures your download speed (how fast you can receive data), upload speed (how fast you can send data), ping (connection latency in milliseconds), and jitter (latency variation). You'll also get a bufferbloat grade showing how your connection handles heavy traffic, plus experience scores for gaming, 4K streaming, video calls, and work from home. Use our internet speed checker regularly as an internet speed monitor to track your connection quality over time.
Frequently Asked Questions
For general browsing, 25 Mbps download is sufficient. For 4K streaming, you need at least 25 Mbps. Gaming requires low latency (under 50ms) more than high bandwidth. Video calls work well with 10+ Mbps and ping under 60ms.
Bufferbloat is excessive latency under load caused by oversized network buffers. It makes your connection feel slow even when speed tests show high bandwidth. Lumina grades your bufferbloat from A (excellent) to F (severe).
Jitter is the variation in latency over time. Low jitter (under 10ms) means a stable connection, essential for gaming and video calls. High jitter causes lag spikes and choppy audio/video.
Lumina tests against local servers to minimize distance-related latency. Results reflect your real-world connection performance. For the most accurate results, test over a wired Ethernet connection and close other bandwidth-heavy applications.
Yes! Lumina is privacy-first. All test results are stored locally in your browser. We never sell your data, require login, or track you across sessions. You can clear your history at any time.