KKavalsia/tools
← all tools
macOS · free

SpeedCheck

When things feel slow you want a quick, honest answer. SpeedCheck runs the internet quality test built into macOS, measuring download and upload throughput plus responsiveness under load (the thing that actually makes calls and pages feel laggy). No app, no website, no signup. Pairs perfectly with NetKeep.

Run in browser - no install

Hit Start test and SpeedCheck measures your real internet download speed and latency right here in your browser. It downloads test files from Cloudflare's global network and times them, then reports your download speed, latency (ping) and jitter. Nothing is stored - it runs entirely on your machine.

Ready when you are
!
This measures real download throughput and latency from your browser. A precise upload test needs the macOS download above, which uses Apple's built-in networkQuality tool for a full two-way report.

Prefer a local copy? ↓ Download the macOS versionv1.0 · added 2026-06-20

Download & run

  1. Download & open
    Unzip and double-click SpeedCheck.command.
  2. Wait ~15s
    It runs the built-in test and prints download, upload and responsiveness.
  3. Read it
    Higher responsiveness (RPM) means smoother calls and browsing.
!
Uses the built-in networkQuality (macOS Monterey and later).