Download > Windows > Developer Tools > Tools & Editors > Specialized Tools > OllyDbg
OllyDbg icon

OllyDbg 2.01

A program which lets you easily debug various applications

Free Download

Average rating: 4.2/5 (12 votes)
Your rating: not submitted

OllyDbg is a powerful and reliable debugger which offers advanced binary code analysis, allowing you to quickly find and fix various issues in your applications. The program comes with a simple and intuitive interface and is able to recognize procedures, trace registers, support API calls, loops, tables, switches, strings and constants. DLLs can be directly loaded and debugged.

OllyDbg is able to quickly locate routines from libraries and object files. The utility is also able to recognize debugging data in Borland format. In addition, the application offers support for comments, user-defined labels and function description.

OllyDbg supports a wide variety of third party plug-ins that will enhance the program's functionality. The utility is able to debug multi thread programs, as well. The application comes with a highly configurable disassembler which is able to support both IDEAL and MASM formats. Support for UNICODE is included.

OllyDbg is able to work with SSE, 3DNow! and MMX instructions and data types. Moreover, the program supports Athlon extensions. The application is capable of recognizing UNICODE and ASCII strings in Delhi format and offers context-sensitive help on multiple API functions. Calls to more than 400 C and 1900 standard API functions can be easily decoded with this tool.

OllyDbg is able to recognize complex code structures and enables you to define logging, conditional, hardware an memory breakpoints. The program also lets you search for masked binary sequences and imprecise commands. The entire allocated memory can be searched.

OllyDbg is able to trace program execution and will log arguments of all known functions. The utility lets you see fix-ups, as well. Stack frames can be dynamically traced. The application is capable of assembling commands into short binary forms.

OllyDbg allows you to analyze and modify memory, pause applications on-the-fly, or set breakpoints with minimum effort. The porgram can start from a floppy disks and installation is not required.


  • The application is packed with lots of powerful functions.
  • Third-party extensions and plug-ins are supported.
Name OllyDbg
Version 2.01
Developer | see all products from this developer
Product Homepage OllyDbg
License Free (Freeware)
Last Week Downloads 6
All Time Downloads 13,055
Filesize 6.6MB
MD5 Checksum 62ED2290A4C36B9BCB426C373AA74CE6
OS Support Windows All
Category Developer Tools

100% CLEAN Certification

BadgeOllyDbg has been tested by team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean. Our editors will recheck this software periodically to assure that it remains clean.


Old Versions

Software Date Added
OllyDbg 2.01 October 03, 2013 - Latest Version
OllyDbg 2.01 Beta 2 Update 4 November 21, 2012
OllyDbg 2.01 Alpha 3 / 2.00.01 April 13, 2011
OllyDbg 2.01 Alpha / 2.00.01 November 29, 2010
OllyDbg 2.00.01 June 21, 2010

Download the free OllyDbg