Free · open source · Windows

Your  wifi  is   fine.
Until   you   decide  it isn't.

A one-click Windows app that fakes a bad internet connection — system-wide, with a slider. For dodging meetings, testing apps, or just messing with a friend's call.

v1.0 · Windows 10/11 · ~73MB installer

iamlagging

Simulate a bad connection, system-wide
GoodTerrible
~9,400 kbps · +330ms latency · 8.3% loss
Start throttle
// how it works

Three steps. No terminal.

Everything happens behind one click — the app handles the Windows admin prompt for you.

01

Install

Download the installer, run it, done. A small icon shows up in your system tray.

02

Set the damage

Click the tray icon, drag the slider from "Good" to "Terrible." Bandwidth, latency, and packet loss all move together.

03

Hit start

Your real connection throttles, system-wide. Meet, Zoom, games, downloads — everything reacts like it's genuinely struggling. One click to undo it.

// who's this for

More uses than you'd think

Built for one reason, useful for a few more.

[escape]

Dodge a call gracefully

"Sorry, my connection is dying" has never been more true.

[qa]

Test your app under real bad conditions

See how your video call tool, site, or game actually behaves on a throttled connection — not a simulated one.

[support]

Train support teams

Practice troubleshooting calls with a customer on genuinely bad wifi, on demand.

[bit]

Mess with a friend

Throttle their stream mid-game. Watch the chat figure it out.

Get iamlagging

Free, open source, and yours to use however you want.

Download for Windows — v1.0
SHA-256: c8bf42c33ad80e9a770d568d1736492b73fc50a3f9043cc85e5674aeee6c5765  ·  73MB  ·  Windows 10/11
!

Windows will show an "Unknown publisher" warning. That's expected — this is a small open-source tool without a paid certificate. Click "More info" → "Run anyway" to continue.