A structured binary editor for reverse engineering — inspect raw bytes as typed structs, arrays, and pointers.

Built from scratch as a modern replacement for ReClass.NET and ReClassEx

Download · Build Instructions · MCP Integration · Alternatives

Reclass helps you inspect raw bytes and interpret them as types (structs, arrays, primitives, pointers, padding) instead of just hex. It is a debugging tool for figuring out unknown data structures — either at runtime from a live process, or from a static source like a binary file or crash dump.

Built with C++17, Qt 6 (Qt 5 also supported), and QScintilla. The entire editor surface is rendered as formatted plain text with inline editing, fold markers, and hex/ASCII previews.

Screenshots

Features

Editor

• Structured binary view — render raw bytes as typed fields with columnar alignment
• Inline editing — click to edit type names, field names, values, base addresses, array metadata, pointer targets, enum members, bitfield members, static expressions, and comments — all with real-time validation
• Tab-cycling — tab through editable fields within a line
• Type autocomplete — cached popup type picker with search/filter for struct targets
• Multi-select — Ctrl+click individual nodes or Shift+click for range selection
• Split views — multiple synchronized editor panes over the same document
• Find bar — Ctrl+F in-editor search with indicator highlighting
• Fold/collapse — expand and collapse structs, arrays, and pointer expansions with embedded fold indicators
• Hex + ASCII columns — raw byte previews alongside the structured view with per-byte change highlighting

Live Memory Analysis

• Auto-refresh — configurable interval (default 660ms) with async page-based reads for non-blocking UI
• Value history & heatmap — per-node ring buffer (10 samples with timestamps), color-coded heat indicators (static/cold/warm/hot) based on change frequency
• Changed-byte highlighting — per-byte change indicators within hex preview lines
• Memory write-back — edit values inline, writes propagate through the provider to live process memory
• Pointer chasing — automatic reads of dereferenced memory regions across pointer chains
• Address parser — formula expressions like <module.exe>+0x1A0, pointer dereference chains, symbol resolution

Undo / Redo

Full command stack with 15 undoable operations: ChangeKind, Rename, Collapse, Insert, Remove, ChangeBase, WriteBytes, ChangeArrayMeta, ChangePointerRef, ChangeStructTypeName, ChangeClassKeyword, ChangeOffset, ChangeEnumMembers, ChangeOffsetExpr, ToggleStatic. Batch macro support for multi-node operations.

Import / Export

Format	Import	Export
Native JSON (.rcx)	Full tree + metadata	Full tree + metadata
C/C++ source	Struct/class/union/enum parsing with offset comments	Header generation with optional static asserts
ReClass XML	Full compatibility with ReClass Classic	Full compatibility
PDB symbols (Windows)	UDT enumeration with selective recursive import via raw_pdb — no DIA SDK dependency

Workspace & Navigation

• Multi-document tabs — MDI interface, one document per tab
• Workspace dock — project explorer tree with struct/enum/union icons, sorted by field count, quick navigation to members
• Scanner dock — integrated memory search panel
• Dual view mode — switch between ReClass tree view and rendered C/C++ output per tab
• View root — focus on a specific struct, hiding all others
• Scroll to node — programmatic navigation to any node by ID

Data Sources

• File — open any binary file and inspect its contents as structured data
• Process — attach to a live process and read its memory in real time (Windows/Linux)
• Remote Process — read another process's memory over TCP with cross-architecture 32/64-bit support
• WinDbg — connect to live WinDbg debugging sessions or load crash dumps
• Saved sources — quick-switch between recently used data sources per tab

Plugin System

DLL plugins loaded from a Plugins folder, auto or manual.

Bundled plugins:

Plugin	Description
Process memory	Attach to local processes on Windows and Linux — PID-based, with symbol resolution and module/region enumeration
WinDbg	Access data from live WinDbg debugging sessions
Remote process memory	TCP RPC-based remote process access with cross-architecture support
ReClass.NET compatibility	Load existing ReClass.NET native DLL plugins directly; optional .NET CLR hosting for managed plugins

MCP Integration

Built-in Model Context Protocol bridge via ReclassMcpBridge — the first reverse engineering tool with native AI/LLM integration. The server uses JSON-RPC 2.0 over named pipes and can be toggled from the Tools menu or auto-started on launch.

Available tools:

Tool	Description
projectState	Read current tree structure, base address, tab state
treeApply	Apply structural command deltas to the node tree
sourceSwitch	Switch the active data source
hexRead	Read bytes at an address
hexWrite	Write bytes at an address
statusSet	Update the status bar text
uiAction	Trigger menu actions programmatically
treeSearch	Search nodes by name or type
nodeHistory	Query value change history for a node

Notifications: notifyTreeChanged, notifyDataChanged

A standalone stdio-to-pipe bridge binary is built alongside the main application. To connect, add this to your MCP client config (e.g. .mcp.json):

{
  "mcpServers": {
    "ReclassMcpBridge": {
      "command": "path/to/build/ReclassMcpBridge",
      "args": []
    }
  }
}

Build

Prerequisites

• Qt 6 (or Qt 5) with MinGW — Qt Online Installer (select MinGW kit + CMake/Ninja from the Tools section)
• CMake 3.20+ — cmake.org (bundled with Qt)
• Ninja — bundled with the Qt installer

Quick Build

git clone --recurse-submodules https://github.com/IChooseYou/Reclass.git
cd Reclass
.\scripts\build_qscintilla.ps1
.\scripts\build.ps1

The build script auto-detects your Qt install location.

macOS Build

./scripts/build_macos.sh --qt-dir /opt/homebrew/opt/qt --build-type Release --package

If you installed Qt via Homebrew, --qt-dir /opt/homebrew/opt/qt is typical on Apple Silicon. You can also set QTDIR or Qt6_DIR instead of passing --qt-dir.

Note: macOS Gatekeeper may block unsigned apps. If the app won't open, go to System Settings > Privacy & Security and click Open Anyway.

Manual Build (MinGW)

1. Clone with --recurse-submodules (or run git submodule update --init --recursive after cloning)
2. Build QScintilla: qmake + mingw32-make in third_party/qscintilla/src
3. Configure and build:

   cmake -B build -G Ninja -DCMAKE_PREFIX_PATH=/path/to/Qt/6.x.x/mingw_64
   cmake --build build
   

4. Optionally run windeployqt on the output executable

Visual Studio 2022+

The msvc/ folder contains a ready-made solution (Reclass.slnx) with projects for the main application, all plugins, and third-party libraries. Requires the Qt Visual Studio Tools extension with a Qt 6 MSVC kit configured.

Running Tests

ctest --test-dir build --output-on-failure

30 tests covering composition, serialization, undo/redo, import/export, provider switching, type visibility, validation, scanning, and rendering.

Alternatives

• ReClass.NET
• ReClassEx

_{MIT License}