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HeroSync

Latency compensation that makes high-ping gameplay feel local.

HeroSync 1.4.0

26.x builds are experimental (bundled-mappings).

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BuildFileSizeSHA-256Get
1.21.1 herosyncr1.4.0-1.21.1.jar 2.06 MB 3dfab5910f9d… JAR
1.21.10 herosyncr1.4.0-1.21.10.jar 2.06 MB 6dcac584744c… JAR
1.21.11 herosyncr1.4.0-1.21.11.jar 2.06 MB fca5cb697ad1… JAR
1.21.2 herosyncr1.4.0-1.21.2.jar 2.06 MB e2b36afb25b0… JAR
1.21.3 herosyncr1.4.0-1.21.3.jar 2.06 MB d0c2b159ee7c… JAR
1.21.4 herosyncr1.4.0-1.21.4.jar 2.06 MB a91114206f79… JAR
1.21.5 herosyncr1.4.0-1.21.5.jar 2.06 MB f0d39263eb06… JAR
1.21.6 herosyncr1.4.0-1.21.6.jar 2.06 MB 1da633392065… JAR
1.21.7 herosyncr1.4.0-1.21.7.jar 2.06 MB 75c2cdff255d… JAR
1.21.8 herosyncr1.4.0-1.21.8.jar 2.06 MB 83d8c1c64e1c… JAR
1.21.9 herosyncr1.4.0-1.21.9.jar 2.06 MB 9504c70a99be… JAR
1.21 herosyncr1.4.0-1.21.jar 2.06 MB f68ef1f499fb… JAR
26.1.1 herosyncr1.4.0-26.1.1.jar 2.05 MB 7b9af5bea152… JAR
26.1.2 herosyncr1.4.0-26.1.2.jar 2.05 MB f087ee59c9d1… JAR
26.1 herosyncr1.4.0-26.1.jar 2.05 MB 6ed1ae079b61… JAR
26.2 herosyncr1.4.0-26.2.jar 2.05 MB c611f4146974… JAR

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Downloads are provided under the HBBML license. Install instructions are in the documentation. Always verify the SHA-256 checksum of downloaded files.

Version history & known issues

All versions, every note

Every release of HeroSync with its warnings and known errors. The table above lets you download any version's files.

1.4.0 2026-08-01 Download files →

Reconciliation & rollback refinements

  • Expanded version matrix to 1.21.11 and 26.x
  • Improved rollback precision
  • Developer API additions
26.x builds use bundled mappings and are experimental
Check server rules — some communities restrict predictive clients
1.3.2 2026-06-12 Download files →

Stability pass

  • Fixed rollback edge cases on high-latency servers
  • Reduced per-tick cost
Fixed: crash when unloading a chunk during a pending rollback
Could not copy — select the hash manually.