Internet Speed Tester

A fast, accurate internet speed tester for IT professionals, web admins, and power users who need reliable network performance metrics.

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About This Tool

The Internet Speed Tester provides end-to-end measurements of download and upload throughput, latency, and jitter against geographically distributed test servers. It is designed for IT teams, network engineers, data centers, and developers who require objective performance data for diagnostics, capacity planning, and benchmarking.
The tool orchestrates test traffic, samples throughput across multiple subtests, and uses median aggregation to reduce outliers. Results are expressed in Mbps for speeds and milliseconds for latency and jitter, with timestamps and export options in JSON or CSV for integration with dashboards or reports.
Core value lies in reproducible metrics, server-region flexibility, and straightforward interpretation, enabling SLAs validation, trend analysis, and performance comparisons across environments. Use cases include validating new network paths, validating ISP claims, benchmarking after configuration changes, and monitoring user-experience performance in web services. The tool is suitable for embedding in monitoring stacks or CI pipelines where automated checks of network performance are required.
Unique features include optional regional server selection, multi-sample aggregation, and robust export formats; privacy-preserving data handling is supported at rest and in transit, with UTC timestamps for cross-region comparisons.

How to Use

Open the tool and optionally set test parameters (server region, duration, concurrency).
Start the test to execute download, upload, latency, and jitter measurements.
Review the resulting metrics: download_speed_mbps, upload_speed_mbps, latency_ms, jitter_ms, and packet_loss_percent.
Export data as JSON or CSV for reporting or dashboards.
Optionally run sequential tests to build a historical trend for comparison.

How to use tester szybkości internetu

Frequently Asked Questions

Find Quick Answers

What does each metric mean?
Download and upload speeds measure throughput to and from the test server (Mbps). Latency is the round-trip time (ms) for a small data packet. Jitter is the variability of latency (ms) across samples. Packet loss indicates the percentage of failed probes during testing.
How accurate are the results?
Accuracy depends on server proximity, network congestion, and the number of samples. The tool uses multiple samples and median aggregation to reduce outliers. Results are most reliable when test servers are chosen to represent typical user paths.
Do VPNs or proxies affect results?
Yes. VPNs or proxies can add extra latency and alter observed throughput. For baseline measurements, perform tests without VPNs. If tests are required through VPNs, enable the option and interpret results accordingly.
Can I test from multiple regions concurrently?
The tool supports sequential regional tests and can be configured for multi-region tests where supported. Concurrency is adjustable to balance measurement speed with accuracy, and results are aggregated per region for comparison.

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