You could have downloaded dZ80 2.0 from our software library for free. The default filename for the program's installer is dZ80w.exe. This PC program works fine with 32-bit versions of Windows XP/Vista/7/8/10/11. The most popular version among the program users is 2.0. The software lies within Development Tools, more precisely Debugging Tools. This free software was originally designed by Inkland Software.
From the developer:
dZ80 is a freeware Z80/Z180/Z80GB disassembler for binary files, such as arcade machine ROMs, Z80-based personal computer snapshots (e.g. Sinclair ZX Spectrum, Amstrad CPC, MSX, Colecovision, etc.) It comes in two flavours, a DOS command line version and a Windows GUI version. Both have the same capabilities, but the Windows version has a built-in front end.
You may want to check out more software, such as LINDO API, Poseidon or Companion.JS for Internet Explorer, which might be similar to dZ80.