8051 Disassembler 3.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free program is a product of SpiceLogic Inc. The software is categorized as Development Tools.
From the developer:
8051 Disassembler can parse the memory of your 8051 microcontroller and lets you view the program code byte by byte. It can decode the Assembly Code and provide information of Special Function Registers, Interrupt Vector, Accumulator, etc., with annotations on the operation being performed by the code. 8051 Disassembler is not just a decompiler or disassembler.
You may want to check out more software, such as mikroBasic PRO for 8051, Nuvoton 8051 ISP-ICP Programmer or 8051 IDE, which might be similar to 8051 Disassembler.
IDE
IDE