# sindresorhus/fast-cli

Test your download and upload speed using fast.com

Repository: https://github.com/sindresorhus/fast-cli
Canonical: https://ross.abutalabs.com/products/fast-cli
Language: TypeScript
License: MIT
License Family: permissive
Topics: speed-test, cli-app, command-line-tool, nodejs, npm-package, download-speed
Last push: 2026-02-02T17:52:19+00:00

## Health v2 (maintenance only)
Score: 69/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 65, release rhythm 56, longevity 100
- inputs: {"age_days": 3759, "days_push": 212, "days_rel": 212, "gap_med": 31, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2874, forks 125 (observed 2026-08-28T04:07:27.267851+00:00)

## What it is
A Node.js CLI tool that measures internet download and upload speeds using fast.com. It supports JSON output, verbose latency and location info, and single-line output for scripting.

## Use cases
- check my internet download speed from the terminal
- measure upload speed via fast.com in a script
- get internet speed test results as JSON for automation
- check latency and bufferbloat from the command line
- log bandwidth measurements to a file over time
- quickly test connection speed without opening a browser

## When to choose
- you want fast.com-based speed tests from the terminal or in scripts
- you need machine-readable JSON speed results for monitoring or automation
- you prefer a lightweight CLI over browser-based speed tests

## When to avoid
- you need speed tests against speedtest.net or other providers
- you cannot install Puppeteer/Chromium dependencies in your environment
- you need a GUI or continuous bandwidth monitoring dashboard

## Facets
- artifact type: cli-tool
- maturity: active
- function: cli, developer-tools, analytics
- domain: developer-tools, networking
- platform: cli, cross-platform
- tags: speed-test, fast-com, internet-speed, bandwidth, network-diagnostics, npm-package, command-line, nodejs

## Member repositories
- sindresorhus/fast-cli (main) score 69

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:27.267851+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:35:49.175940+00:00, confidence not recorded.
  - readme: https://github.com/sindresorhus/fast-cli (fetched 2026-08-28T04:07:27.267851+00:00, sha fdd196f320c1)
  - registry_npm: https://registry.npmjs.org/fast-cli (fetched 2026-08-29T09:51:42.433658+00:00, sha f2da43304d58)
- Data as of 2026-08-30T08:39:29.467469+00:00.