How to Get Started with ZathuraDbg
ZathuraDbg is an open-source, GUI-based assembly debugger that runs without any setup — you download it, launch it, and start debugging. It's built for learning and experimenting with assembly, so it fits best if you want to step through instructions, watch registers and memory change, and edit memory live rather than debug compiled binaries. If your goal is to attach to a real executable and trace it, ZathuraDbg isn't the right tool yet (see the limitations below).
What ZathuraDbg actually is
ZathuraDbg is an emulation-based debugger, not a native process debugger. It's powered by three components:
- Icicle — the emulator that executes your assembly
- Capstone Engine — disassembly
- Keystone Engine — assembly
Because it emulates rather than attaches to a running process, there's no environment to configure and no target program to compile first. You work directly with assembly inside the tool.
Getting started
- Download it. The site's navigation includes a Download link alongside Home, Features, About, FAQs, and Socials. The current release is ZathuraDbg 1.0.
- Launch it. The site states "No Setup Needed — Works out of the box — just launch and debug." There's no installer configuration or dependency setup described.
- Pick your architecture. ZathuraDbg supports x86_64, ARM32, Thumbv7m, and AArch64, with more architectures stated as coming soon.
- Write or load assembly and step through it. The interface is described as beginner-friendly, with commands explained clearly.
- Edit memory while it runs. The built-in hex editor lets you change memory live, so you can update variables and see the effect immediately.
The site also offers a "Try now" option in addition to Download, if you want to look before installing.
Features worth knowing before you start
| Feature | What it means for you |
|---|---|
| No setup required | Launch and debug immediately; nothing to configure |
| Beginner-friendly interface | Commands are explained in the UI, so you can learn as you go |
| Built-in hex editor | Edit memory live during execution for immediate feedback |
| Time travel debugging | Step backward through execution while preserving memory and stack integrity, with only a few megabytes of overhead |
| Multi-architecture | x86_64, ARM32, Thumbv7m, AArch64 |
Time travel debugging is the standout capability here: instead of restarting a run to re-examine an earlier state, you can step back and inspect it directly. The site claims this works with minimal overhead (a few megabytes), which matters if you're stepping through long instruction sequences.
Limitations to check against your use case
These come directly from the site's FAQ, and they determine whether ZathuraDbg fits your task:
- It does not debug binaries. ZathuraDbg does not support debugging binaries at the moment; this may be added in a future release. If you need to load a compiled executable and trace it, this tool won't do it today.
- Syscall and OS-level API support is incomplete. The site says it does not fully support a large number of syscalls and OS-level APIs, though implementation for common syscalls is under development. Programs that depend heavily on OS interaction may not behave as expected.
- Architecture coverage is expanding. x86_64, ARM32, Thumbv7m, and AArch64 are supported now; others are under development. Note that the About section describes current support as x86_64, while the FAQ and feature list include the additional architectures — treat the broader list as the current stated coverage.
Who this is for
ZathuraDbg is aimed at beginners learning assembly and at developers or reverse engineers who want a lightweight environment for experimenting with instructions and memory. It's a good fit if you want to:
- Practice writing and stepping through assembly without setting up a toolchain
- Watch registers, stack, and memory change instruction by instruction
- Rewind execution to understand where something went wrong
- Edit memory mid-run and observe the result
It's a poor fit if you need to debug a real binary, rely on extensive syscall or OS API behavior, or work on an architecture outside the supported list.
Practical first session
A reasonable first exercise: write a short sequence that moves values between registers and writes to memory, then step through it while watching the hex editor. Change a value in memory mid-execution and confirm the next instruction reads the new value. Then use time travel to step back and verify the earlier state is intact. This exercises the three things ZathuraDbg is built around — stepping, live memory editing, and backward execution — without needing any external program.