Lertaro

Free plan Windows

What Lertaro is

Lertaro is a free, open-source Windows tool for launching file searches and handling related file tasks. It indexes local and network locations using NTFS/ReFS USN change journals and MFT tables; FAT32/exFAT change notifications and network-share caching are also supported. Search offers 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, and Alt+P opens QuickLook previews. A Treemap view analyzes indexed disk usage without rescanning, with folder drill-down and cleanup actions. It supports Flow Launcher community plugins and provides a .NET 10 C# plugin SDK. The maker says the software runs locally and offline, without telemetry or cloud communication. The project is MIT licensed. Installer and portable downloads are listed for x64 and ARM64 Windows, with the free plan specified for Windows 10/11 on both architectures.

Who it suits

Lertaro suits Windows users who want quick searches across local or network files and integration with file dialogs or supported file managers. It may also suit developers who want to extend it with plugins.

What it does well

Search supports fuzzy matching and path filters.
Works with local and network index locations.
Can dock in Windows Open and Save dialogs.
Treemap analyzes indexed disk use without rescanning.
Runs locally and offline, according to its maker.

What to know first

Windows is the only listed platform.
The listed plan supports Windows 10/11.
Search indexing features vary by file system.

Plans

Plan	Billed and limits	Price
Free and open source	Windows 10/11 · x64 and ARM64	Free

As lertaro.github.io lists them, read 11 Oct 2026. The maker's own page has the final word.

Getting started

Visit https://lertaro.github.io/.
Choose the installer or portable download for x64 or ARM64 Windows.
Use the Free and open source plan, listed as free.
For bugs or feature ideas, use GitHub issues.

Verdict

Lertaro combines file search with dialog integration, previews, disk analysis, and plugin support for Windows. Check its file-system support and Windows version requirements against your setup.

Questions

How much does Lertaro cost?

The Free and open source plan is listed as free.

Which platforms does Lertaro support?

Lertaro is for Windows 10/11 on x64 and ARM64. Installer and portable downloads are listed for both architectures.

Is Lertaro open source?

Yes. The GitHub repository identifies the project as MIT licensed.

Can Lertaro search network locations?

Yes. Network locations are supported, including network share caching.

Which integrations are listed?

The site lists compatibility or integration with File Explorer, Total Commander, Directory Opus, OneCommander, QuickLook, LocalSend, and Flow Launcher.

Does Lertaro send data to the cloud?

The maker says Lertaro runs locally and offline, with zero telemetry and no cloud communication.

Facts from Lertaro's own pages

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

Where Lertaro stands on Freedom251

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