The short answer is , there is no stable, finished 64-bit release of OllyDbg.
OllyDbg has long been a staple in the reverse engineering community for its intuitive user interface and powerful binary analysis features. However, as modern computing has moved almost exclusively to 64-bit architectures, users often search for a to handle contemporary executables. Is There an Official OllyDbg 64-bit Version? ollydbg 64 bit debugger download
Oleh Yuschuk noted that transitioning from 32-bit to 64-bit was far more complex than initially expected. The change in command sets and different calling conventions required rewriting the analysis engine almost entirely from scratch. Progress stalled around 2014, and the project has remained frozen since. Top 64-bit Alternatives to OllyDbg The short answer is , there is no
Because OllyDbg cannot natively debug 64-bit applications, the community has largely migrated to modern alternatives that offer similar—and often superior—functionality. Download - OllyDbg Is There an Official OllyDbg 64-bit Version
If you still wish to experiment with this "historical" alpha, it remains available on the official OllyDbg website . Why OllyDbg 64-bit Was Never Finished
Development of OllyDbg officially ceased in 2013 after version 2.01.
The developer, Oleh Yuschuk, did release a very early and incomplete 64-bit version (odbg64.zip) for testing purposes. It is considered buggy, lacks critical analysis features, and is generally not recommended for professional or intensive use.