You are currently viewing How to Fix “Swap Failed” Error on Uniswap: A Comprehensive Guide
How to Fix Swap Failed Error on Uniswap
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  • Post last modified:05/04/2024
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The “Swap Failed” error is a common issue encountered by users of the Uniswap decentralized exchange. This error can be caused by various factors, including slippage, insufficient funds, and network issues. In this article, we will provide a step-by-step guide on how to fix the “Swap Failed” error on Uniswap, along with troubleshooting tips and prevention methods.

Table of Contents

    Also Read: Top 5 Uniswap Common Errors and Their Solutions [FIXED 100%]

    Common Causes of “Swap Failed” Error on Uniswap:

    1. Slippage: Slippage is the difference between the expected price of a trade and the actual price at the time of execution. If the slippage exceeds the user’s tolerance settings, the swap may fail.
    2. Insufficient Funds: Users need to have enough ETH or tokens in their wallet to pay the gas fee required for the swap. In some cases, there may be extreme spikes in Ethereum transaction fees due to heightened demand, making it difficult to complete the swap.
    3. Network Issues: Transactions on Uniswap are processed on the Ethereum blockchain, which can experience congestion and delays. If a transaction takes too long to complete, it may fail due to the Uniswap interface’s built-in protection against making a trade at a price that’s substantially different from the intended price.

    Step-by-Step Guide to Fix “Swap Failed” Error on Uniswap

    Adjust Slippage Tolerance:

    Increase your slippage tolerance to allow for more flexibility in the trade. This can be done by clicking the gearbox icon and selecting the “Custom” option under “Max slippage.” Then, input the maximum amount of slippage you’re willing to accept.

    Check Transaction Deadline:

    Ensure that your transaction has enough time to complete before it times out. If the transaction takes more than 30 minutes, it may fail due to the Uniswap interface’s protection mechanisms.

    Check Funds:

    Ensure that you have enough ETH or tokens in your wallet to pay the gas fee for the swap. If you’re experiencing high transaction fees, consider waiting for gas prices to decrease before attempting the swap.

    Troubleshoot Network Issues:

    If you suspect network issues, try restarting your wallet or using a different browser to access Uniswap. Additionally, ensure that you’re using the latest version of your wallet and Uniswap interface.

    Troubleshooting Tips:

    • Check Transaction Hash:

    If your swap fails, you can enter the transaction hash into to see what went wrong and potentially recover your funds.

    • Increase Gas Limit:

    If your gas limit is too low, your transaction may run out of gas before it can complete. Increase the gas limit to ensure that your transaction has enough resources to execute.

    • Add Zeros to Amount:

    In some cases, adding zeros to the amount of coins you’re swapping can resolve the “swap failed” error.

    Prevention Methods:

    • Monitor Gas Fees: Keep an eye on Ethereum transaction fees and adjust your swap size and slippage tolerance accordingly to minimize gas costs.
    • Use a Hardware Wallet: Storing your ETH and tokens in a hardware wallet can help protect your funds from potential scams and hacking attempts.
    • Keep Your Wallet Updated: Ensure that you’re using the latest version of your wallet and Uniswap interface to avoid compatibility issues and security vulnerabilities.


    The “Swap Failed” error on Uniswap can be frustrating, but with the right knowledge and tools, it can be resolved. By understanding the common causes, following the step-by-step guide, and employing troubleshooting tips and prevention methods, you can successfully complete your token swaps on Uniswap.

    FAQs – Swap Failed” Error on Uniswap

    Why does Uniswap sometimes have high gas fees?

    Regularly check liquidity pool status, especially before engaging in significant swaps. Liquidity can change, impacting the success of your transactions.

    What if my transaction fails due to smart contract interference?

    Review the smart contracts involved and their interactions. Adjust the sequence or timing of transactions to avoid conflicts.

    Are there alternative decentralized exchanges to Uniswap?

    Yes, there are alternatives like Sushiswap and PancakeSwap. Explore different platforms to find the one that best suits your needs.


    • Jacoby Pope

      Jacoby Pope is an accomplished Article Editor at "Crypto Customer Care" with an extensive 7-year tenure in the cryptocurrency realm. Specializing in crafting comprehensive guides and troubleshooting solutions for various crypto wallets, as well as providing insights into cryptocurrency, trading, and investment strategies, Jacoby is a seasoned professional in the field.