Importing a World
Uploading a single player world to multiplayer for a better experience
Zipping Software
We recommend using 7-Zip for uploading. Other clients such as Win-Rar may suffice.
Zipping your World
Select your world under Singleplayer and hit Edit

Next, you'll select on Open World Folder

From here, you'll see your world folder. Now, select everything and hit Add to .zip

Depending on your world size, it may take some time. Once it's complete, you'll see a new zip file in that same folder containing your world.
Uploading to Lagless
Before you start
If you already have a world file, remember to delete it before uploading. If you are starting from scratch, you can skip this step.
We recommend using an SFTP client such as WinSCP or FileZilla.
To launch an SFTP session, go to Files and click on Launch SFTP.

Create a folder, we recommend naming it world. Remember if you choose to name it something else, you will need to change world-name in server.properties

Enter the folder you just created, then drag and drop your file over. Depending on your internet speed, this may take some time.
Unzipping
Finally, go back to your File Manager and unzip the world.

You can delete the zipped folder uploaded previously. Now, you can start your server and play with friends.