> For the complete documentation index, see [llms.txt](https://docs.qsafewallet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.qsafewallet.com/all-features/swapping.md).
# Swapping
QSafe Wallet’s swap feature simplifies decentralized token exchanges across multiple blockchains. Here's a breakdown of how it works, using the screenshots attached as examples:
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**1. Swap Interface Overview**
The swap screen allows you to convert one cryptocurrency into another (e.g., **POL → USDC** on Polygon). Key components include:
* **Token Selection**:
* **Input Token**: Select the token you want to spend (e.g., POL).
* **Output Token**: Choose the token you want to receive (e.g., USDC).
* **Amount Input**:\
Enter the quantity of the input token (e.g., `0.0001 POL`).
* **Network Selection**:\
Specify the blockchain for the swap (e.g., Polygon).
* **Recipient Address**:\
Optionally set a destination address for the received tokens.
* **Preview Button**:\
Simulate the swap to view real-time rates, fees, and slippage.
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**2. How It Works Under the Hood**
1. **Price Aggregation**:\
Q Safe Wallet queries decentralized exchanges (DEXs) and aggregators to find the **best possible rate** for your swap. For example, in the screenshot, swapping `0.0001 POL` yields `0.000021 USDC`.
2. **Gas Fee Estimation**:\
The wallet calculates the **network fee** (gas) required to execute the transaction.
3. **Slippage & Risk Management**:
* **Slippage Tolerance**: The maximum acceptable price change during execution (default 0.5%).
* **Minimum Received**: Ensures you get at least the specified amount even if prices fluctuate.
4. **Security Checks**:
* Validates if you have enough funds to cover both the swap amount **and gas fees** .
* Alerts you if funds are insufficient (as shown in the error message).