: Players can export their single-player worlds as .epk files to ensure they don't lose progress if their browser cache is cleared .
Advanced users often modify EPK files to create custom Texture Packs . Since you can't just drop a folder into a browser, you have to use an "EPK Compiler" to turn your custom images back into a format the game recognizes. Eaglercraft 1.5.2 Epk Files
If you are developing custom texture packs or want to extract an Eaglercraft world into vanilla Minecraft, you must unpack the file. Play Eaglercraft Online - Free Browser Minecraft : Players can export their single-player worlds as