OllyDbg is a 32-bit assembler level analysing debugger for Microsoft ® Windows ®. Emphasis on binary code analysis makes it particularly useful in cases where source is unavailable.

This Agreement covers only the version 1.10 of the OllyDbg and version 1.10 of the OllyDbg Plugin Development Kit. All other versions are covered by separate License Agreements.

OllyDbg 2.0 lives, and it makes plenty of fun again to develop. You've waited for so long - so be patient, please, and sooner or later I'll introduce you my promising younger son :)

Read this for quick start. Consult help file for details and more features.

October 24, 2013 - first presentation of the 64-bit OllyDbg. What is even not an alpha, buggy as hell and can't debug? - OllyDbg 64! (This is a joke).

OllyDbg remembers all patches applied to debugged application in previous debugging sessions. From the Patch window, you can quickly apply patches or restore original code;

when OllyDbg receives debugging event from the debugged application, it passes this event to ODBG2_Pluginmainloop (). Additionally, if event is EXCEPTION_DEBUG_EVENT, it calls …

OllyDbg allows you to scan the code and extract the list of commands referencing all (well, most of) text strings, either ASCII, UNICODE or, if enabled in options, Pascal-style and search …

Disassembler () is the main part of the OllyDbg, and one of the most complex. Disassembler not only converts binary code to the human-readable mnemonics, it also highlights and comments …

When exception occurs, one can backtrace several (or hundreds of thousands) last commands and analyse conditions that led to error. OllyDbg 1.06 has significantly improved the …