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LibreSpeed Logo

LibreSpeed command line tool

Don't have a GUI but want to use LibreSpeed servers to test your Internet speed? 🚀

librespeed-cli comes to rescue!

This is a command line interface for LibreSpeed speed test backends, written in Go.


  • Ping
  • Jitter
  • Download
  • Upload
  • IP address
  • ISP Information
  • Result sharing (telemetry) [optional]
  • Test with multiple servers in a single run
  • Use your own server list or telemetry endpoints
  • Tested with PHP and Go backends


Requirements for compiling

  • Go 1.14+

Runtime requirements

Use prebuilt binaries

If you don't want to build librespeed-cli yourself, you can find different binaries compiled for various platforms in the releases page.

Building librespeed-cli

  1. First, you'll have to install Go (at least version 1.11). For Windows users, you can download an installer from For Linux users, you can use either the archive from, or install from your distribution's package manager.

    For example, Arch Linux:

    # pacman -S go
  2. Then, clone the repository:

    $ git clone -b v1.0.0
  3. After you have Go installed on your system (and added to your $PATH if you're using the archive from, you can now proceed to build librespeed-cli with the build script:

    $ cd speedtest-cli
    $ ./

    If you want to build for another operating system or system architecture, use the GOOS and GOARCH environment variables. Run go tool dist list to get a list of possible combinations of GOOS and GOARCH.

    Note: Technically, the CLI can be compiled with older Go versions that support Go modules, with GO111MODULE=on set. If you're compiling with an older Go runtime, you might have to change the Go version in go.mod.

    # Let's say we're building for 64-bit Windows on Linux
    $ GOOS=windows GOARCH=amd64 ./
  4. When the build script finishes, if everything went smoothly, you can find the built binary under directory out.

    $ ls out
  5. Now you can use the librespeed-cli and test your Internet speed!

Install from AUR

To install librespeed-cli from AUR, use your favorite AUR helper and install package librespeed-cli-bin

$ yay librespeed-cli-bin

... or, clone it and build it yourself:

$ git clone
$ cd librespeed-cli-bin
$ makepkg -si

Install from Homebrew

See the librespeed-cli Homebrew tap.

Install on Windows

If you have either Scoop or Chocolatey installed you can use one of the following commands:

  • Scoop (ensure you have the extras bucket added):

    > scoop install librespeed-cli
  • Chocolatey:

    > choco install librespeed-cli

Container Image

You can run librespeed-cli in a container.

  1. Build the container image:

    docker build -t librespeed-cli:latest .
  2. Run the container:

    docker run --rm --name librespeed-cli librespeed-cli:latest
    # With options
    docker run --rm --name librespeed-cli librespeed-cli:latest --telemetry-level disabled --no-upload
    # To avoid "Failed to ping target host: socket: permission denied" errors when using --verbose
    docker run --rm --name librespeed-cli --sysctl net.ipv4.ping_group_range="0 2147483647" librespeed-cli:latest --verbose


You can see the full list of supported options with librespeed-cli -h:

$ librespeed-cli -h
   librespeed-cli - Test your Internet speed with LibreSpeed 🚀

   librespeed-cli [global options] [arguments...]

   --help, -h                     show help (default: false)
   --version                      Show the version number and exit (default: false)
   --ipv4, -4                     Force IPv4 only (default: false)
   --ipv6, -6                     Force IPv6 only (default: false)
   --no-download                  Do not perform download test (default: false)
   --no-upload                    Do not perform upload test (default: false)
   --no-icmp                      Do not use ICMP ping. ICMP doesn't work well under Linux
                                  at this moment, so you might want to disable it (default: false)
   --concurrent value             Concurrent HTTP requests being made (default: 3)
   --bytes                        Display values in bytes instead of bits. Does not affect
                                  the image generated by --share, nor output from
                                  --json or --csv (default: false)
   --mebibytes                    Use 1024 bytes as 1 kilobyte instead of 1000 (default: false)
   --distance value               Change distance unit shown in ISP info, use 'mi' for miles,
                                  'km' for kilometres, 'NM' for nautical miles (default: "km")
   --share                        Generate and provide a URL to the share results
                                  image, not displayed with --csv (default: false)
   --simple                       Suppress verbose output, only show basic information
                                  (default: false)
   --csv                          Suppress verbose output, only show basic information in CSV
                                  format. Speeds listed in bit/s and not affected by --bytes
                                  (default: false)
   --csv-delimiter CSV_DELIMITER  Single character delimiter (CSV_DELIMITER) to use in
                                  CSV output. (default: ",")
   --csv-header                   Print CSV headers (default: false)
   --json                         Suppress verbose output, only show basic information
                                  in JSON format. Speeds listed in bit/s and not
                                  affected by --bytes (default: false)
   --list                         Display a list of servers (default: false)
   --server SERVER                Specify a SERVER ID to test against. Can be supplied
                                  multiple times. Cannot be used with --exclude
   --exclude EXCLUDE              EXCLUDE a server from selection. Can be supplied
                                  multiple times. Cannot be used with --server
   --server-json value            Use an alternative server list from remote JSON file
   --local-json value             Use an alternative server list from local JSON file,
                                  or read from stdin with "--local-json -".
   --source SOURCE                SOURCE IP address to bind to
   --timeout TIMEOUT              HTTP TIMEOUT in seconds. (default: 15)
   --duration value               Upload and download test duration in seconds (default: 15)
   --chunks value                 Chunks to download from server, chunk size depends on server configuration (default: 100)
   --upload-size value            Size of payload being uploaded in KiB (default: 1024)
   --secure                       Use HTTPS instead of HTTP when communicating with
                         operated servers (default: false)
   --skip-cert-verify             Skip verifying SSL certificate for HTTPS connections (self-signed certs) (default: false)
   --no-pre-allocate              Do not pre allocate upload data. Pre allocation is
                                  enabled by default to improve upload performance. To
                                  support systems with insufficient memory, use this
                                  option to avoid out of memory errors (default: false)
   --telemetry-json value         Load telemetry server settings from a JSON file. This
                                  options overrides --telemetry-level, --telemetry-server,
                                  --telemetry-path, and --telemetry-share. Implies --share
   --telemetry-level value        Set telemetry data verbosity, available values are:
                                  disabled, basic, full, debug. Implies --share
   --telemetry-server value       Set the telemetry server base URL. Implies --share
   --telemetry-path value         Set the telemetry upload path. Implies --share
   --telemetry-share value        Set the telemetry share link path. Implies --share
   --telemetry-extra value        Send a custom message along with the telemetry results.
                                  Implies --share

Use a custom backend server list

The librespeed-cli supports loading custom backend server list from a JSON file (remotely via --server-json or locally via --local-json). The format is as below:

    "id": 1,
    "name": "PHP Backend",
    "server": "",
    "dlURL": "garbage.php",
    "ulURL": "empty.php",
    "pingURL": "empty.php",
    "getIpURL": "getIP.php"
    "id": 2,
    "name": "Go Backend",
    "server": "",
    "dlURL": "garbage",
    "ulURL": "empty",
    "pingURL": "empty",
    "getIpURL": "getIP"

The --local-json option can also read from stdin:

echo '[{"id": 1,"name": "a","server": "","dlURL": "garbage.php","ulURL": "empty.php","pingURL": "empty.php","getIpURL": "getIP.php"}]' | librespeed-cli --local-json -

As you can see in the example, all servers have their schemes defined. In case of undefined scheme (e.g. //, librespeed-cli will use http by default, or https when the --secure option is enabled.

Use a custom telemetry server

By default, the telemetry result will be sent to You can also customize your telemetry settings via the --telemetry prefixed options. In order to load a custom telemetry endpoint configuration, you'll have to use the --telemetry-json option to specify a local JSON file containing the configuration bits. The format is as below:

  "telemetryLevel": "full",
  "server": "",
  "path": "/results/telemetry.php",
  "shareURL": "/results/"

For telemetryLevel, four values are available:

  • disabled to disable telemetry
  • basic to enable telemetry with result only)
  • full to enable telemetry with result and timing
  • debug to enable the most verbose telemetry information

server defines the base URL for the backend's endpoints. path is the path for uploading the telemetry result, and shareURL is the path for fetching the uploaded result in PNG format.

Currently, --telemetry-json only supports loading a local JSON file.


Although we have tested the cli, it's still in its early days. Please open an issue if you encounter any bugs, or even better, submit a PR.

How to contribute

If you have some good ideas on improving librespeed-cli, you can always submit a PR via GitHub.


librespeed-cli is licensed under GNU Lesser General Public License v3.0