MC Version Converter
Ranked in Minecraft World Converters ·Free plan
About
MC Version Converter is a free command-line tool for converting Minecraft: Java Edition worlds saved in 26.1 or later so they can open in versions 1.18.2 through 1.21.11. It is distributed as source code and requires Rust to build with `cargo build --release` on Linux, macOS, or Windows. For older targets, it reverses several newer data formats, including those for items, entity equipment, attributes, sign text, and player bed respawns. Batch mode reads world folders from `input_worlds/` and writes converted results to separate folders in `output_worlds/`; it does not modify the original world. Versions 1.17.x and earlier are unsupported because their world height differs from newer versions. Content introduced in 26.x may be lost when converted, and blocks without a target-version equivalent can be replaced with air when a target block allowlist is supplied. Other data without a legacy equivalent is dropped, and oversized `.mcc` chunk files are copied without conversion. Corrupt region, POI, or chunk files are skipped with a warning. The project is unofficial and MIT-licensed.
Who it is for
It suits Minecraft: Java Edition players who need to move worlds from 26.1 or later to versions 1.18.2 through 1.21.11 and can build a Rust project. It is not suited to conversions targeting 1.17.x or earlier.
What is good
- Converts 26.1-or-later worlds to versions 1.18.2–1.21.11
- Batch mode writes converted worlds to separate folders
- Leaves original world files unchanged
- Skips corrupt files with a warning
What to know first
- Requires building from source with Rust
- Versions 1.17.x and older are unsupported
- Some 26.x content or data may be lost
Verdict
MC Version Converter targets a specific conversion path from newer Java Edition worlds to versions 1.18.2 through 1.21.11. Check the documented content-loss limits and build requirement before converting a world.
Compared on Minecraft world converters
- Free plan
- Yesgithub.com
- Source editions
- Minecraft: Java Edition 26.1 or latergithub.com
- Target editions
- Minecraft: Java Edition 1.18.2–1.21.11github.com
- Java-Bedrock conversion
- Nogithub.com
- Version conversion
- Yesgithub.com
- Format conversion
- Yesgithub.com
- Preserves entities
- Yesgithub.com
- Batch conversion
- Yesgithub.com
Facts
- Purpose
- Converts Minecraft: Java Edition worlds saved in 26.1 or later into a format that versions 1.18.2 through 1.21.11 can open.github.com · 29 Sept 2026
- Conversion direction
- Conversion from older versions to newer versions is described as a future direction.github.com · 29 Sept 2026
- Build and distribution
- The tool is distributed as source code and users build it with Rust using `cargo build --release`.github.com · 29 Sept 2026
- Platforms
- The README says the `mcconvert` CLI works on Linux and macOS, and `run.bat` is for Windows.github.com · 29 Sept 2026
- Conversion features
- For older target versions, the converter reverses legacy item, entity equipment, attribute, sign text, and player bed respawn formats, among other changes.github.com · 29 Sept 2026
- Original files
- The README says the original world is never modified and conversion results are written to a new folder.github.com · 29 Sept 2026
- Compatibility limit
- Versions 1.17.x and earlier are unsupported because their world height differs from newer versions.github.com · 29 Sept 2026
- Data loss
- Blocks, items, and mobs added in 26.x may be lost when converting to older versions, and blocks without a target version equivalent are replaced with air.github.com · 29 Sept 2026
- Other limitations
- The README says some 26.x data with no legacy equivalent is dropped, and oversized `.mcc` chunk files are copied without conversion.github.com · 29 Sept 2026
- Failure handling
- Corrupt region, POI, or chunk files are skipped with a warning instead of stopping the conversion.github.com · 29 Sept 2026
- License
- The repository is licensed under the MIT License.github.com · 29 Sept 2026
- Affiliation
- The README describes the tool as unofficial and says it is not affiliated with Mojang or Microsoft.github.com · 29 Sept 2026
- Integrations
- The README documents no integrations; it describes a local command-line tool built with Rust.github.com · 29 Sept 2026
- Supported targets
- It supports conversion to Minecraft versions 1.21.11 down to 1.18.2.github.com · 30 Sept 2026
- Features
- It reverses legacy world, item, entity, attribute, sign, and player respawn data formats when required by the target version.github.com · 30 Sept 2026
- World safety
- The original world is never modified; conversions are written to a new folder.github.com · 30 Sept 2026
- Installation
- The tool is distributed as source code and requires building with Rust using cargo build --release.github.com · 30 Sept 2026
- Block handling
- Blocks unavailable in the target version can be replaced with air when a target-version block allowlist is supplied; without it, replacement is skipped.github.com · 30 Sept 2026
- Limitations
- Versions 1.17.x and older are unsupported because their world height differs from newer versions.github.com · 30 Sept 2026
- Support
- The opened project page documents command-line usage, error codes, and known limitations; it does not state a support service or response commitment.github.com · 30 Sept 2026
- Security and affiliation
- The page calls the tool unofficial and says it is not affiliated with Mojang or Microsoft.github.com · 30 Sept 2026
- License and credits
- The repository identifies an MIT license and credits Claude for assistance with development and reverse-engineering.github.com · 30 Sept 2026
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Sources
- github.com/imDinus/mc-version-converter· checked 29 Sept 2026