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主要言語: TypeScript
Test your download and upload speed using fast.com
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- 最終更新
- 2026/10/15
gem-hunter主要言語: TypeScript
Test your download and upload speed using fast.com
Test your download and upload speed using fast.com
Ensure you have Node.js 22.12+ installed. Then run the following:
npm install --global fast-cli
This project uses Puppeteer under the hood. On first run, it downloads Chrome (~200 MB) if it's not already installed. Most install issues are related to that.
$ fast --help
Usage
$ fast
$ fast > file
Options
--upload, -u Measure upload speed in addition to download speed
--single-line Reduce spacing and output to a single line
--json JSON output
--verbose Include latency and server location information
Examples
$ fast --upload > file && cat file
17 Mbps
4.4 Mbps
$ fast --upload --json
Include additional diagnostic information like latency and client location:
fast --verbose
72 Mbps
8 Mbps
Latency: 8 ms (unloaded) / 16 ms (loaded)
Client: Osaka, JP • 216.144.245.67
Server: Osaka, JP | Tokyo, JP
The speeds are in Mbps.
fast --upload --json
{
"downloadSpeed": 52,
"uploadSpeed": 64,
"downloadUnit": "Mbps",
"uploadUnit": "Mbps",
"downloaded": 270,
"uploaded": 290,
"latency": 9,
"bufferBloat": 46,
"userLocation": "Somewhere, NO",
"serverLocations": ["Somewhere, NO", "Elsewhere, SE"],
"userIp": "49.222.206.21"
}