# Network Conditions

> Use Proxyman Network Conditions to simulate slow or lossy networks like 3G, 4G, or poor Wi-Fi for one host or all traffic, and test your app.

## 1. What's it?

Network Conditions (Network Throttling) lets developers simulate poor network environments. Proxyman provides various preset profiles:

| Profile              | Description                              |
| -------------------- | ---------------------------------------- |
| 100% Loss            | 100% of packets are dropped              |
| Very Bad Network     | Download/Upload: < 1mbps                 |
| Slow Network         | Download/Upload: 5-10 mbps               |
| Medium Network       | Download/Upload: 10-20 mbps              |
| 2G (EDGE)            | Download: <240kbps, Upload <200kbps      |
| 3G                   | Download: <780kbps, Upload <330kbps      |
| 4G (LTE)             | Download: 30-50mbps, Upload 5-10mbps     |
| 5G                   | Download: 50-150mbps, Upload 10-50mbps   |
| Wi-Fi                | Download: 25-40mbps, Upload 15-30mbps    |
| Wi-Fi 802.11ac       | Download: 150-250mbps, Upload 70-100mbps |

## 2. Benefit?

* Various preset profiles: 3G, 4G, 5G, Wi-Fi, Bad/Medium Network, etc.
* Simulate different network conditions (download/upload bandwidth, packet drop rate, delay).
* Easily test your app under a particular network condition.
* Apply to all traffic that goes through Proxyman (**Apply System-wide**) or only to **certain hosts**.

> **Note:** From Proxyman 6.9.0, you can create your own profile. In the rule editor, click **Custom Profile...** next to the Network Profile dropdown, then set the download and upload bandwidth (Mbps), delay (ms), and packet loss (%). Proxyman saves your custom profiles so you can reuse them.

> **Note:** To better simulate real life, the download/upload bandwidth is not fixed. It changes randomly within the given range.

## 3. How to use it?

Open the **Tools** menu -> **Network Conditions…** (⌥⌘J), or right-click a request -> **Tools** -> **Network Conditions…**

![Proxyman Network Conditions rule Simulate 3G with the 3G profile, bandwidth, packet loss, delay and Custom Profile... button](https://proxyman.com/docs/assets/proxyman-network-conditions-rule-editor.jpg)

_Simulate a 3G network_

## 4. Alternative

* Network Link Conditioner for macOS: [Network Link Conditioner guide on NSHipster](https://nshipster.com/network-link-conditioner/)

## Learn more

* [Simulate poor network conditions on iOS with Proxyman](https://proxyman.com/posts/2022-06-25-Simulate-slow-network-with-Proxyman-network-conditions-tool)