All free tools
Server properties generator.
Build a small, clearly explained Java configuration file.
# Generated with Purpify's Java server properties tool gamemode=survival difficulty=normal max-players=10 view-distance=10 white-list=true online-mode=true pvp=true
Use the generated file
This generator creates a small Java Edition configuration, not every possible setting. Stop your server, back up the existing file, then merge the generated values and restart.
Why keep online-mode enabled?
Online mode verifies player identities through Minecraft’s authentication system. Keep it enabled for a normal standalone server. Proxy setups need additional configuration beyond this tool.
Free to use. No account required. Inputs stay in your browser.