fast

Netflix-powered internet speed test CLI

TLDR

Run speed test

$ fast

Run with upload test

$ fast --upload

Output on a single line (script-friendly)

$ fast --single-line

Show JSON output

$ fast --json

Include latency and server location

$ fast --verbose

fast is a command-line speed testing tool powered by Netflix's Fast.com service. It measures download speed and optionally upload speed using Netflix's servers worldwide.The tool provides a quick bandwidth measurement without ads or complexity. It's useful for testing internet connection quality and ISP performance.

PARAMETERS

-u, --upload

Measure upload speed in addition to download speed.

--single-line

Reduce spacing and print output on a single line.

--json

Output results as JSON.

--verbose

Include latency and server location information.

OUTPUT

$    $ fast

     Ping: 12ms
   Download: 95.2 Mbps
   (Upload test with --upload)

INSTALL

nix profile install nixpkgs#fast

CAVEATS

Requires internet connection to Netflix's servers. Results may vary by location and time. Netflix servers may be throttled by some ISPs. For more detailed tests, use speedtest-cli.

HISTORY

fast-cli was created as a command-line interface to Netflix's Fast.com, which Netflix launched in 2016 as a simple, ad-free speed test. The service uses Netflix's content delivery network.

RESOURCES

Source code