A decentralized exchange (DEX) is an online platform where users can trade cryptocurrencies directly with each other without intermediaries. Using blockchain technology, DEXs offer secure, transparent, and fast trading while reducing the risk of hacks or fraud. Traders maintain full control of their digital assets, ensuring ownership and safety. By removing middlemen, these platforms make transactions peer-to-peer, efficient, and reliable, giving users a safer and more autonomous way to manage and exchange their crypto holdings.