Networking Toolbox offers online tools for IP addressing and subnet calculations.
CLI
Run Cloudflare’s internet speed test from a terminal and view results in a text interface.
About CLI
CLI runs Cloudflare's internet speed test from a terminal and shows results in an interactive text interface. It measures download and upload throughput, idle and loaded latency, DNS resolution and TLS handshake timing, and UDP packet loss and jitter, with options for IPv4/IPv6 comparison, traceroute, proxy routing, interface binding, history review, and JSON or CSV export.
It uses endpoints from speed.cloudflare.com. Network information on Windows is incomplete, and SSID detection does not work on macOS Sonoma 14.4 and later.
Key features
- Measures download/upload throughput and idle/loaded latency
- Reports DNS resolution and TLS handshake timing each test
- Measures packet loss, jitter, and MOS-style link score
- Compares IPv4 vs IPv6 or forces one address family
- Optional ICMP traceroute to Cloudflare edge
- Saves results as JSON or CSV with text mode for scripting
Best for: People who prefer the terminal for running Cloudflare speed tests and saving results for scripting.
Good for
- Open source under GPL-3.0 license
- Installable via Cargo, Homebrew, MacPorts, Nix, binaries, or Docker
- Includes interactive display plus text and JSON modes for scripting
Watch out for
- Network information on Windows is incomplete
- Cannot detect SSID on macOS Sonoma 14.4 and later
CLI at a glance
- Category
- Development › Network Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
CLI alternatives
Tools and sites you could use instead, ranked by how closely they match.
Benchmark HTTP and HTTPS endpoints with Plow, which displays results in a web UI or terminal.
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Run a self-hosted HTML5 internet speed test with LibreSpeed, which supports multiple server configurations.
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Test download and upload speeds from the command line using fast.com with fast-cli.
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Measure network performance with OpenSpeedTest, an open-source HTML5 speed test built with browser APIs.
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Connect local services through Cloudflare Tunnel with cloudflared, the command-line tunnel client.
Open source
24 alternativesPopular in Network Tools
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CLI FAQ
How do I run it without the interactive interface?
Run cloudflare-speed-cli --text for text output mode.
What service does it use for measurements?
It uses endpoints from speed.cloudflare.com.
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