What is a DEX?
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 5 min
In short
A DEX lets you swap directly from your own wallet without depositing funds with an operator. There is no account to open and listings are permissionless — but there is also no support desk when you mis-click or buy a scam token. Smart contracts execute everything.
Key points
- Swaps settle straight from your wallet, with no deposit
- No account opening and no identity check
- Anyone can list a token, so fakes sit alongside real ones
- Every swap costs gas
Definition
An exchange where smart contracts match and settle swaps without ever taking custody of users' assets.
On a DEX such as Uniswap or PancakeSwap you connect a wallet, pick the pair and swap. Your counterparty is not a person but a liquidity pool, and the price usually comes from a formula applied to the pool's balances — an AMM.
Because there is no account or identity check, tokens that no exchange has listed are tradable. The flip side is that anyone can deploy a fake with the same name and symbol. Verify the contract address against the project's own site or a block explorer before buying.
Fees work differently too: a swap fee paid to the pool, plus network gas. On small trades gas can dominate, which is why many users route through Layer 2 networks where fees are lower.
Watch out for
- · Fake tokens reuse real names — always verify the contract address
- · There is no desk that can reverse a bad send or a careless approval
- · Thin liquidity can fill your order at a price far from what you expected