⚡ Lertaro

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[!CAUTION] Security notice: download Lertaro only from official sources. For your security, download Lertaro only from the official repository, website, and GitHub Releases. Do not download or run files from unverified sources or repositories.

Lertaro is an ultra-lightweight, high-performance, extensible global search and productivity launcher for Windows, built on .NET 10 (WPF). It's a modern, open-source alternative to Listary and Everything — indexing local drives via the NTFS USN Journal and $MFT for near-instant, low-resource search.

📖 Full Documentation, User Manual & Developer Manual

Highlights

• ⚡ USN & MFT Low-Level Indexing — reads the NTFS/ReFS USN Change Journal and $MFT directly instead of walking directories; a lightweight background service keeps the index in sync in real time with FAT32/exFAT monitoring and network share caching.
• 🎯 fzf-Style Fuzzy Search & Aliases — multi-keyword jump matching with directory path tokens and prefix/suffix/exact/exclude operators, plus non-ASCII pinyin alias transliteration.
• 📂 Three Window Modes & Deep Docking — a quick popup window, a full main window, and an inline bar that automatically docks into native Open/Save file dialogs and major file managers (File Explorer, Total Commander, Directory Opus, OneCommander).
• 🎬 Actions Menu & QuickLook Preview — press Ctrl+O for the actions menu with native Shell right-click integration, or press Alt+P for seamless QuickLook file previews.
• 📊 Instant Disk Space Treemap — explore indexed disk usage visually in a real-time Treemap without rescanning disks, drill down into oversized folders, and execute cleanup actions.
• 🧩 Open Plugin SDK & Ecosystem Bridge — clean .NET 10 C# SDK contracts for custom search providers, aliases, actions, columns, and previews, plus compatibility with Flow Launcher community plugins.
• 🛡️ 3-Process Isolation & Offline Privacy — SYSTEM background service (Lertaro.Service), user-mode WPF UI (Lertaro.App), and UIPI-bypassing hook helper (Lertaro.Service --hook) are strictly isolated. 100% local with zero telemetry.

See the User Manual for search syntax, every hotkey, and every settings option; the Developer Manual for architecture and the plugin SDK reference.

Download

Grab the latest release from the homepage or directly:

• x64 (Intel / AMD)
  • Installer (Lertaro-Setup.exe) — recommended, supports the background service.
  • Portable (Lertaro-Portable.zip) — no install, unzip and run.
• ARM64 (Native for Snapdragon / Windows on ARM)
  • Installer (Lertaro-Setup-arm64.exe) — recommended for ARM devices.
  • Portable (Lertaro-Portable-arm64.zip) — native portable build for ARM.

Building from Source

Requirements: Windows 10/11, .NET 10 SDK, Visual Studio 2022 or JetBrains Rider, and the 64-bit edition of Inno Setup 7 if you want to build the installer.

• build_and_run.bat — rebuilds App/Core/Service/plugins and relaunches everything locally.
• make.bat — produces Release builds for both x64 and ARM64 in dist/.

See the Developer Manual for the full architecture and plugin SDK.

🎁 Support & Donation

If Lertaro has been useful to you, thank you for considering a donation!

• USDT (TRC20): TNDh3husX1trDW2ZPm4ZZYdoCoCRCZQXn5

License

MIT License.