The search engine your PC deserves.
Lumen bypasses the Windows API to search your local files instantly. Find documents by raw text, and images by semantic meaning. 100% local inference. Zero cloud telemetry.
Lumen requires Administrator privileges to read the raw NTFS Master File Table. As an independent release, Windows SmartScreen may flag the installer as 'Unknown Publisher'—click 'Run Anyway'.
The Expansion Update.
Lumen 1.3.0 breaks its limits. We rebuilt the core architecture from the ground up to bring you native drag-and-drop, custom hard drive indexing, and a hyper-optimized UI.
01 Dual-Process Architecture
A completely new Named Pipes (IPC) bridge separates the Admin Kernel engine from the Standard UI, unlocking flawless zero-friction drag-and-drop to your Desktop.
02 Custom Volume Indexing
Lumen is no longer restricted to C:\. Add external drives, D:\ partitions, and custom project folders directly to your ML Brain via the new Settings Dashboard.
03 Native Visual Previews
Stop guessing by file names. Lumen hooks asynchronously into the Windows Cache to instantly display high-res thumbnails for images and videos at 60fps.
04 Smart Filters & Context
Instantly filter 2 million files down to just Videos or Documents. Right-click any result to summon the native Windows Properties dialog or copy the file.
The Engine
ArchitectureRaw MFT Parsing
Bypasses standard APIs to read the Master File Table directly. Indexes millions of files in under 5 seconds.
Multimodal Local AI
Runs quantized neural networks entirely on your CPU via ONNX Runtime. Search your personal images and documents by concept.

FTS5 In-Document Search
Uses a SQLite Virtual Table to build an inverted index of your PDFs and Word docs. Type a sentence, find the exact document it's written in.

The Footprint
Completely self-contained. ~100MB idle RAM to keep the Windows Kernel hook, SQLite database, and two AI models loaded for 0ms latency.
Pricing & Roadmap
DeploymentLumen Core
Free Forever
- ✦Instant MFT Keyword Search.
- ✦SQLite FTS5 In-Document Search.
- ✦Semantic Text & Image Search.
- ✦Custom Volume Indexing (D:\ Drives).
Lumen Next
- ↳Local OCR (Search text inside screenshots).
- ↳Semantic Video Search (Frame extraction).
- ↳Network/NAS Drive Support.
- ↳Duplicate File Detection.