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Lertaro

Lertaro is a free, open-source file search launcher and productivity tool for Windows.

Place
#32 of 57
Score
5.8
Lertaro's website

What Lertaro is

Lertaro is a free, open-source file search launcher and productivity tool for Windows. It indexes local and network locations using NTFS/ReFS USN change journals and MFT tables, and supports FAT32/exFAT change notifications plus network-share caching. Search provides fuzzy matching, path tokens, prefix and suffix filters, and pinyin aliases for non-ASCII text. Lertaro can dock in Windows Open and Save dialogs and synchronize selections and active paths with supported file managers. Its actions menu connects to native Shell right-click options, while Alt+P triggers QuickLook previews. A Treemap view analyzes indexed disk usage without rescanning disks and includes folder drill-down and cleanup actions. Lertaro supports Flow Launcher community plugins and provides a .NET 10 C# plugin SDK. The maker says the software runs locally and offline, with no telemetry or cloud communication. Installer and portable downloads are listed for x64 and ARM64 Windows. The free plan costs nothing for Windows 10/11 on those architectures.

Good

  • Search supports fuzzy matching and path filters.
  • Can dock in Windows Open and Save dialogs.
  • Treemap analyzes indexed disk usage without rescanning.
  • Runs locally and offline, according to the maker.
  • Installer and portable downloads for x64 and ARM64.

Watch out

  • Windows-only software.
  • Treemap analyzes indexed disk usage rather than rescanning disks.
  • QuickLook previews require the Alt+P shortcut.

Who it suits

Lertaro suits Windows users who want to search local or network files and work from Open and Save dialogs. Its plugin support may also suit users of Flow Launcher community plugins.

Verdict

Lertaro combines file search with dialog integration, previews, and indexed disk analysis. Its Windows-only availability and indexing approach are key considerations for choosing it.

Plans and prices

From Lertaro's own pricing page, checked 11 Oct 2026.

All about pricing
PlanPriceWhat it gives you
Free and open sourceFreeWindows 10/11 · x64 and ARM64

The facts

Each one read from Lertaro's own pages, with the date it was checked.

What it does

Actions and preview
The actions menu provides native Shell right-click integration, and Alt+P triggers QuickLook file previews.checked 11 Oct 2026
Architecture
Lertaro separates its LocalSystem background service, user-mode WPF application, and keyboard-hook helper into isolated processes.checked 11 Oct 2026
Disk analysis
Its Treemap view analyzes indexed disk usage without rescanning disks and supports folder drill-down and cleanup actions.checked 11 Oct 2026
Downloads
The maker lists installer and portable downloads for x64 and ARM64 Windows.checked 11 Oct 2026
File dialogs
Lertaro can dock in Windows Open/Save dialogs and synchronize selections and active paths with supported file managers.checked 11 Oct 2026
Indexing
It uses NTFS/ReFS USN change journals and MFT tables for indexing, and supports FAT32/exFAT change notifications and network share caching.checked 11 Oct 2026
Integrations
The site lists File Explorer, Total Commander, Directory Opus, OneCommander, QuickLook, LocalSend, and Flow Launcher compatibility or integration.checked 11 Oct 2026
License
The GitHub repository identifies the project as MIT licensed.checked 11 Oct 2026
Plugins
Lertaro provides a .NET 10 C# plugin SDK and supports Flow Launcher community plugins.checked 11 Oct 2026
Privacy
The maker says Lertaro runs locally and offline, with zero telemetry and no cloud communication.checked 11 Oct 2026
Product
Lertaro is an open-source file search launcher and productivity tool for Windows.checked 11 Oct 2026
Search
Its search supports fzf-style fuzzy matching, path tokens, prefix/suffix filters, and pinyin aliases for non-ASCII text.checked 11 Oct 2026
Support
The maker directs users to GitHub issues for bugs and feature ideas and accepts donations to support development.checked 11 Oct 2026

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