MemDBG

MemDBG is a free, open-source console payload and native frontend for memory inspection, scanning, debugging, trainer creation, and research on PS4, PS5, and host machines. It is aimed at offline homebrew development, reverse-engineering education, preservation, and authorized security research. Scanning options include exact values, process-wide searches, AOB patterns, pointer chains, unknown values, and heuristic Smart Auto-Search.

The debugger provides thread control, stepping, registers, breakpoints, watchpoints, stack walking, and disassembly. Trainer workflows include saving and loading .cht files, importing batchcode, toggling or locking values, and exporting patches to trainers. Desktop-side Lua and Python plugins can be loaded from repository manifests; the public MemDBG plugin repository is the default source. The project documents a GDB remote bridge for IDA Pro and an optional x64dbg bridge. It uses a versioned MDBG protocol and can expose a separate ps5debug-compatible listener for older clients. MemDBG is licensed GPL-3.0-or-later and remains in active pre-release development.

MemDBG offers a broad set of memory research, debugging, and trainer workflows for authorized offline use. Its pre-release status and platform caveats matter when deciding whether it fits a particular setup.

MemDBG is for people doing legitimate debugging, homebrew work, education, preservation, or authorized research on systems they own or may analyze. Users should be prepared for a pre-release project and platform-specific setup considerations.

Overview

MemDBG is a console payload and native frontend for inspecting memory, debugging, and building trainers on PS4, PS5, and host machines. It best suits people working on systems they own or are authorized to analyze; its broad toolkit is compelling for that work, but its active pre-release status calls for care before relying on it.

The project focuses on offline homebrew development, reverse-engineering education, preservation, and authorized security research. Its maintainers reject online cheating, piracy, unauthorized access, and disruptive conduct toward online services or other players. That boundary makes MemDBG a poor fit for anyone seeking to affect online play or access systems without permission.

MemDBG uses its versioned MDBG protocol and can expose a separate ps5debug-compatible listener for older trainer and debugger clients. It is open source under GPL-3.0-or-later. The combination of scanning, debugger controls, trainer workflows, and plugin support gives experienced users room to build a connected process, though pre-release development means compatibility and setup deserve attention.

Key features

Scanning and debugging

Scanning covers exact values, process-wide searches, AOB patterns, pointer chains, unknown values, and a heuristic Smart Auto-Search workflow. That range supports both targeted searches and investigations where the value or location is not yet known. The debugger adds thread control, stepping, register inspection, breakpoints, watchpoints, stack walking, and disassembly, making MemDBG more than a scan-and-edit utility for users who need to inspect execution as well as memory.

Trainer workflows and plugins

Trainer tools can save and load .cht files, import batchcodes, manage ON/OFF values and lock intervals, and export patches to trainers. These features are useful when research needs to become a repeatable trainer workflow, but they also make the project specialized rather than a lightweight general-purpose debugger.

The desktop frontend supports Lua and Python plugins sourced from repository manifests, with a public MemDBG plugin repository as its default source. GDB remote integration for IDA Pro and an optional x64dbg plugin bridge can fit users already working with those tools. Protocol limits remain relevant for larger operations: packet and MEMORY_READ sizes are capped at 1 MiB, and batch reads or writes allow up to 64 items.

Pricing

MemDBG is free and open source, with no free trial because there is no paid plan. GPL-3.0-or-later licensing makes it a natural option for users comfortable with open-source software and its terms. No paid tiers, seat limits, or quotas are part of the stated offer.

Platforms

MemDBG lists Android, iOS, Linux, macOS, and Windows support. Platform caveats matter: some macOS debugger actions may require SIP or code-signing changes, and the iOS/iPadOS release artifact is unsigned. Users on those platforms should weigh setup and signing requirements before choosing it; the platform list alone does not remove those hurdles.

Host builds bind to loopback by default. For LAN sessions, the README recommends using an allowlisted frontend IP, a useful security measure for users exposing a host build beyond the local machine.

Who it's for

MemDBG is aimed at developers and researchers doing offline homebrew work, reverse-engineering education, preservation, or authorized security analysis on PS4, PS5, or host systems. Its broad scan and debugger methods make it better suited to people who need to investigate memory and execution than to users looking for a simple single-purpose editor. Anyone reporting a problem is asked to provide the payload and frontend versions, platform, firmware, and logs, so users should be prepared to supply that context when seeking help.

Pros and cons

• Pros: Scanning, debugger, trainer, and plugin workflows live in one project, reducing the need to assemble separate tools for those tasks.
• Pros: Compatibility with older ps5debug clients and bridges to IDA Pro and x64dbg can support existing debugging workflows.
• Pros: Free, open-source availability makes the full project accessible without a paid tier.
• Cons: Active pre-release development is a meaningful caveat for users who need a settled, dependable workflow.
• Cons: macOS debugger actions may require system or signing changes, while the iOS/iPadOS artifact is unsigned.
• Cons: The 1 MiB packet and MEMORY_READ caps and 64-item batch limit constrain request size.

Alternatives

Game Memory Editors is the broader category to browse if MemDBG's console and research focus does not match the job.

scanmem is another free, open-source option for Android and Linux; choose it if those platforms and its narrower stated profile fit better than MemDBG's multi-platform console, debugger, and trainer scope.

Squalr is free and open source across Android, API, Linux, macOS, and Windows, so it is worth considering if that platform range suits your needs better.

GameEx is a free, open-source Android alternative for readers focused on that platform.

ProMod offers a free iOS plan with up to six mods toggled on at a time, making it a more focused choice when that cap fits the task; its desktop ProMod tier uses custom pricing and is distributed and supported through Patreon.

ReClass.NET is free, open source, and available on Linux and Windows; choose it if those platforms and its no-charge MIT-licensed offering fit your needs.

ArtMoney provides a free Windows SE edition with some features unavailable, plus a PRO edition for $24.90, paid once. It suits readers who want that Windows freeware-to-paid choice rather than MemDBG's free, multi-platform project.

Bit Slicer is free, open source, and supports macOS 10.8 or later, a narrower alternative for Mac users.

CoSMOS is free on Linux and Windows, with no registration, locked features, adware, or hidden software; choose it if that stated no-cost, no-locks offer is the priority.

Verdict

Choose MemDBG if you need a free, open-source toolkit that brings memory scanning, debugging, trainer building, and plugin workflows together for authorized offline work. Its breadth is the main reason to pick it; active pre-release development and platform-specific caveats are the reasons to look elsewhere when you need a more settled setup or a platform without those hurdles.