To get free money on Blox Fruits, you can use several effective methods. One way is to redeem codes. For example, **fudd10_v2** gives $2, and **fudd10** gives $1. You can redeem these by tapping the blue gift icon in the game and entering the code.
Another method is AFK farming. Use the awakened Quake fruit at The Haunted Castle Island. Equip the Cho accessory to reduce ability cooldowns. This allows you to earn money while being away from the keyboard.
Exploiting infinite money glitches is also an option. Complete the Vice Admiral quest at Marine Fortress, kill the boss, and then server hop to repeat the process. This glitch can provide unlimited money.
Sea Beast hunting is effective too. Defeat Sea Beasts in the sea to earn significant amounts of money. Though it can be time-consuming, it is worth the effort.
You can also try bounty hunting. Hunt wanted players to earn bounties, which can be up to 30 million belly. Lastly, participating in raids can provide a large amount of money, especially if you use Butterfruit to make raids easier.