How to Use Uniswap | Step-by-Step Token Swap Guide with Screenshots [2026]

Want to learn how to use Uniswap? This article explains how to swap tokens step by step with screenshots.

"I want to exchange ETH for another token, but I don't know how..." "I've heard of Uniswap, but I'm not sure how to use it..."

This guide walks you through token swapping on a testnet environment. Practice safely without fear of losing real funds, and master the basics of token swapping!

📋 What You'll Learn

✅ How to perform basic operations on Uniswap with screenshots

✅ How to configure slippage and gas fee settings

✅ How to compare DEXs and find the right one for you

Uniswap is the world's largest decentralized exchange (DEX) that allows you to swap tokens without intermediaries. It supports 8 chains centered around Ethereum, and anyone can use it simply by connecting a wallet.

Unlike traditional exchanges (CEXs), no account registration or identity verification is required — you can swap tokens directly from your own wallet. Think of it like exchanging yen for dollars at a currency exchange, but without needing a bank.

In this guide, we'll practice token swapping on a testnet using Uniswap.

What You'll Need

• Rabby Wallet (connected to a testnet)
• Testnet ETH (for gas fees)
• Internet connection

If you haven't set up a wallet yet, start by following 👉 How to Set Up MetaMask.

Step 1: Access Uniswap and Connect Your Wallet

Open Uniswap in your browser: https://app.uniswap.org/

💡 If the screen looks different: Uniswap's design may be updated from time to time, but the core features are in similar locations. Look for key buttons like "Swap," "Select," and "Confirm."

Click the "Connect" button in the top right to connect your wallet.

Select "Rabby Wallet" from the wallet list.

The Rabby Wallet app will open and ask for connection permission — tap "Connect" or "Allow."

Step 2: Switch to Testnet

To use Uniswap on a testnet, go to the settings in the top right corner and toggle on "Testnet mode."

If you've already received testnet tokens from a faucet, your ETH balance should appear on the screen.

Step 3: Select the Token and Amount to Swap

Tap "Select a token" to choose the token you want to swap to.

Start by swapping from "ETH" to another test token (e.g., "USDC").

After tapping "Select a token," type "USDC" in the search bar.

Enter the amount you want to swap. For example, enter 0.01 ETH.

Once you enter the amount, the estimated amount of tokens you'll receive is automatically displayed below.

Step 4: Review and Execute the Swap

Click the "Review" button.

A confirmation screen will appear. Pay attention to the following:

• Exchange rate (how much per 1 ETH)
• Slippage (acceptable price fluctuation range)
• Gas fees (transaction fees)

Once confirmed, press the "Swap" button and proceed with the wallet operation.

Step 5: Sign and Complete the Swap

After clicking Swap, Rabby will prompt you for a signature — click the "Sign" button.

Once the swap is complete, a confirmation screen will appear.

Go back to your Rabby Wallet and check if the newly acquired tokens are displayed. If they're not showing, you may need to add the token manually.

✅ Congratulations! You've successfully swapped tokens! You've now mastered how to exchange different types of crypto assets.

Slippage and gas fees are common stumbling blocks for beginners when swapping on Uniswap.

How to Set Slippage

Slippage is the difference between the price at the time of your order and the actual execution price. You can adjust the tolerance in Uniswap's settings.

• Small trades: 0.5–1% is fine
• Large trades: Set to 0.1–0.5% and split into multiple transactions
• Low-liquidity tokens: May require 2–5%

Tips to Reduce Gas Fees

• Use L2 chains: Gas fees on Ethereum L1 can reach $10–100, while L2s like Arbitrum cost only $0.05–0.5
• Avoid peak hours: Gas fees tend to be lower during early morning hours (4–8 AM JST)
• Check the gas limit: The default auto-setting usually works, but if fees are abnormally high, try again later

When participating in airdrops, token swapping is often necessary.

• Preparing gas tokens: Airdrop tasks require gas fees (ETH or L2 tokens). Use Uniswap to swap to the tokens you need
• Exchanging airdropped tokens: Uniswap is convenient for converting airdropped tokens into ETH or stablecoins
• Participating in DeFi protocols: Token swaps are essential for DeFi activities like liquidity provision and staking, which are often airdrop-eligible

To actually participate in airdrops, you'll need to prepare real funds.

Candy Drops is running a collaboration campaign with "OKJ," a Financial Services Agency-licensed crypto exchange. By registering through this link, you'll receive 1,000 yen worth of Bitcoin.

Additionally, by completing KYC and verifying tasks on the Candy Drops dashboard, you can earn 50,000 Candy Drops points that can be used to enter regularly held campaigns.

Don't miss this opportunity — join today!

There are other DEXs (decentralized exchanges) besides Uniswap where you can swap tokens. Here's a comparison:

Recommended for beginners: Start with Uniswap to learn the basics. Once you're comfortable, try 1inch to automatically find the best rates across multiple DEXs.

What is Uniswap?

Uniswap is the world's largest decentralized exchange (DEX) that allows you to swap tokens without intermediaries. It supports 8 chains centered around Ethereum, and anyone can use it by simply connecting a wallet.

How much are Uniswap's fees?

Swap fees range from 0.01–1% (depending on the token pair), plus blockchain gas fees. Gas fees on Ethereum L1 used to reach $10–100, but currently they're around ~$0.50 on L1, and only $0.05–0.5 on L2s like Arbitrum.

What is slippage?

Slippage is the difference between the price at the time of your order and the actual execution price. Tokens with lower liquidity tend to have higher slippage. A setting of 0.5–1% is generally recommended. For large trades, reduce the slippage tolerance and split the transaction into multiple swaps for safety.

Great work! We've covered everything from the basics to practical operations of Uniswap.

Key Takeaways!

• Swapping is the function for exchanging different tokens
• Uniswap makes token swapping simple and secure
• Pay attention to slippage and gas fee settings
• Practice thoroughly on a testnet before moving to mainnet

Next Steps!

Now that you've mastered the basics of token swapping, check out 👉 How to Set Up MetaMask to strengthen your wallet security settings. Try participating in airdrop activities too!