Most Eaglercraft hack clients provide a standard suite of features: :
Prevents you from taking damage when falling from great heights. 4. Browser Performance Hacks Hacks For Eaglercraft 1-5-2
If you prefer not to download a separate client, you can use vanilla Minecraft commands. You must enable "Allow Cheats" during world creation or by using the "Open to LAN" trick in the pause menu to temporarily grant yourself permissions. Most Eaglercraft hack clients provide a standard suite