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Server to Singleplayer World Converter
What it is
Server to Singleplayer World Converter is a free web tool for turning Minecraft Java or Bedrock server worlds into singleplayer worlds. It accepts Java world ZIP files and Bedrock .mcworld or ZIP files, detecting the edition and format automatically. Players can transfer a chosen player's inventory, position, and experience, or begin with a fresh player; multiplayer conversions carry over only the selected player's data. The converter preserves Java regions and chunks or the full Bedrock LevelDB, changing player-related records. For Java worlds, it removes certain Paper and Bukkit entries, stale session data, and tags specific to those server types. The maker says conversion happens in the browser without uploads, a backend, or analytics, and that its single HTML file supports offline use. Optional Java player-name lookups make network calls, while Bedrock conversion makes none. Bedrock players appear as XUIDs with an inventory preview. Java server gamerules reset to defaults and need to be reapplied. Some pre-1.16 Java worlds are unsupported, and the converted world should be opened in the server's Minecraft version. The project is licensed under PolyForm Noncommercial License 1.0.0.
For and against
For
- Accepts Java ZIP and Bedrock world files
- Preserves Java regions or Bedrock LevelDB
- Runs client-side and supports offline use
- Transfers one chosen player's inventory and progress
Against
- Java gamerules reset to defaults
- Some pre-1.16 Java worlds are unsupported
- Optional Java name lookups require network calls
- Licensed for noncommercial use
The verdict
The converter handles both Java and Bedrock worlds and lets players retain data for one selected player. Check the Java-world compatibility limits and reapply server gamerules after conversion.
Who it suits
This tool suits Minecraft Java and Bedrock players who want to convert server worlds for singleplayer use. It accommodates workflows that preserve one selected player's data or start fresh.
Plans and prices
Free
Browser based · Java and Bedrock world conversion
Read 3 Oct 2026 · github.com
On the record
- Accepted files
- Accepts Java world ZIP files and Bedrock .mcworld files or ZIP files, and detects the edition and format automatically.github.com · read 3 Oct 2026
- Audience
- The tool is for Minecraft players converting server worlds for singleplayer use, with Java and Bedrock workflows documented.github.com · read 3 Oct 2026
- Bedrock player IDs
- Bedrock players are shown by XUID with an inventory preview because the maker says there is no open gamertag lookup.github.com · read 3 Oct 2026
- Compatibility limits
- Pre-1.16 Java worlds that use flat RandomSeed without WorldGenSettings are unsupported, and the converted world should be opened in the server's Minecraft version.github.com · read 3 Oct 2026
- Game rules limitation
- Java server gamerules reset to defaults because they are not stored in the world folder and must be reapplied manually.github.com · read 3 Oct 2026
- Integrations and libraries
- The README credits NBTify, JSZip, and pako, and names PlayerDB, Crafthead, and Ashcon for optional Java name lookups.github.com · read 3 Oct 2026
- Java cleanup
- It removes Paper and Bukkit datapack entries, paper-world.yml, stale session.lock, and Bukkit or Paper-only NBT tags.github.com · read 3 Oct 2026
- Java name lookup
- Optional Java player name lookup uses PlayerDB, Crafthead, and Ashcon, and the converter can read usercache.json included in the ZIP.github.com · read 3 Oct 2026
- License
- The project states it is licensed under PolyForm Noncommercial License 1.0.0.github.com · read 3 Oct 2026
- Multiplayer worlds
- Only the selected player's data is carried over from a multiplayer world.github.com · read 3 Oct 2026
- Offline use
- The maker describes the single HTML file as supporting full offline use.github.com · read 3 Oct 2026
- Player transfer
- Can carry over a chosen player's inventory, position, and experience, or start fresh.github.com · read 3 Oct 2026
- Privacy
- The maker says conversion runs client-side with no uploads, backend, or analytics; optional Java name lookups make network calls, while Bedrock conversion makes none.github.com · read 3 Oct 2026
- Purpose
- Converts Minecraft Java or Bedrock server worlds into ready-to-play singleplayer worlds.imsirr.github.io · read 3 Oct 2026
- World preservation
- The converter preserves Java regions and chunks and the full Bedrock LevelDB, changing player-related records.github.com · read 3 Oct 2026
