PyMemoryEditor

A pure-Python library (built on ctypes) that lets you inspect, modify and search the memory of any running process in a few lines of Python — Cheat Engine workflows on Windows, Linux and macOS!

Read, write and scan the memory of any process — straight from Python.
One unified API. Three operating systems. No C compiler. No native build step.

Runs on 🪟 Windows · 🐧 Linux · 🍎 macOS — 32-bit and 64-bit.

Tweak a value in a running game · inspect a live program's state · harvest data straight from RAM.

Install

pip install PyMemoryEditor

To also install the bundled GUI app (a Cheat Engine-style scanner), use the app extra:

pip install "PyMemoryEditor[app]"
pymemoryeditor

For faster scans on large processes, add the speed extra. It pulls in NumPy and automatically vectorizes the numeric scan comparison loop — ~10–30× faster on selective scans:

pip install "PyMemoryEditor[speed]"

📖 Full guide at Read the Docs.

See it in action

from PyMemoryEditor import OpenProcess

with OpenProcess(name="game.exe") as process:

    # Scan the whole process for every address holding the value 100.
    for address in process.search_by_value(int, value=100):
        print(f"Found at 0x{address:X}")

    # Read the current value, then write a new one back.
    current = process.read_int(address)
    process.write_int(address, current + 500)

That's it — read, write or scan another process in three lines, the same way on every platform.

What's inside

🐍 The Python library

Full control over another process's memory — in a few lines of Python:

• ✅ Read & write values (int, float, bool, str, bytes)
• 🔍 Value scan with eight comparison modes
• 🎯 Pattern scan (IDA-style AOB & regex)
• 🔗 Pointer chains + a live RemotePointer handle
• 🧭 Pointer scan — find static pointers that survive ASLR
• 🗺️ Memory map, modules, threads
• 🧱 Allocate & free remote memory (Windows / macOS)

🖥️ The bundled GUI app

All the library's power — no code required:

• ⚡ Zero setup — attach to a process and start scanning in seconds
• 🧲 Refine workflow — First Scan → Next Scan with live visual feedback
• 📋 Cheat table — freeze / write values on the fly, JSON import/export
• 🔬 Hex viewer — browse raw memory and write back inline
• 🧩 Pointer scan UI — scan, export & rescan across sessions with a few clicks
• 🎨 One-click access — every feature at your fingertips, no code needed

📖 Documentation

Full documentation lives at pymemoryeditor.readthedocs.io — installation, the Cheat Engine workflow, every method and parameter, the GUI app guide, platform notes and troubleshooting.

A quick map of where to go:

What can I build with this?

• 🎮 Game modding & speedrunning tools — the classic Cheat Engine use case.
• 🔬 Debugging & introspection — inspect live state without attaching a debugger.
• 📊 Observability tooling — sample variables in a running process for telemetry.
• 🔐 Security & reverse-engineering research — on systems you own or are authorized to test.
• 🎓 Learning — the bundled app is a great teaching tool for how memory scanning works.

[!NOTE] Responsible use. PyMemoryEditor talks to other processes through OS-level APIs. Only point it at processes you own or have explicit permission to inspect.

🤝 Contributing

Pull requests, bug reports and feature ideas are very welcome. Read CONTRIBUTING.md for the development setup, test layout and the small set of platform-specific quirks to be aware of.

If PyMemoryEditor helped your project, please ⭐ the repo — it's the easiest way to support the work and to help others discover the library.

License

Released under the MIT License — free for personal and commercial use.