I want a list of crypto exchanges where erc20 token can be listed for free.
Centralised and decentralised both.
Thanks in advance
To tell you truth, you will not be able to list your coins to any decent exchanges without a fee. Those exchange which list with zero fee are either brand new exchanges or those exchanges which are not so popular ones. You need to spend some amount if you want to list your coin to good exchanges.
You are wrong, there are many old and trusted exchange sites which list coin/tokens for free. What they check is the type of project and future of the project. For example Bittrex you can check more of them
here.