Download FluentCleaner 26 for free, an open-source junk file cleaner featuring a modern WinUI 3 design. It is portable for immediate use without installation, completely ad-free, and updated to the latest version.
What is FluentCleaner?
FluentCleaner is a free, open-source system cleaner built with WinUI 3, matching the native look of Windows 11 for a clean and seamless system integration from the first launch. The program is inspired by CCleaner the simple and straightforward early era, focusing solely on doing one primary task well: scanning for system junk and deleting it based on selected items.
Its main function is scanning for unnecessary files such as system temporary files, browser caches and history, log files, leftover update files, and caches of installed programs and games. The program uses the community-maintained winapp2.ini database, allowing it to recognize hundreds of applications and thousands of cleaning items ranging from Edge, Chrome, and Firefox to Spotify. Simply click Analyze to instantly view what is found, with each item clearly displaying file counts and sizes, then check only the parts you want to delete and click Run Cleaner.
What makes it trustworthy is its transparency; the program does not hide what each item will delete and warns beforehand when an item carries risks, such as items that might affect Steam installation files or Firefox history stored together with bookmarks in the same file. It also allows you to exclude certain folders or files using Global Exclusions and manage cookies separately by keeping login cookies for frequent websites while removing tracking cookies.
FluentCleaner avoids traditional registry cleaners that falsely claim to speed up your PC. The Registry page explicitly states that it does not touch that area, and the only registry-related removals are traces associated with cleaning items. It also includes built-in supplementary tools such as an integrated terminal for command execution, a Custom Cleaners page for writing your own rules as .ini files or PowerShell scripts, and command-line execution support.
The program is portable and requires no installation—simply extract the ZIP file and open FCleaner.exe to start using it. It supports Windows 10 version 2004 and newer operating systems, making it ideal for anyone whose storage is filling up with accumulated junk files and who wants to reclaim space while retaining full control over every step of what to delete and what to keep.
Key Features
- Winapp2.ini Database Utilizes a community-driven cleaning database supporting thousands of applications, covering over 3,700 items, with in-app updates available.
- Organizes cleaning items into categories, providing a clear view of what files the system will delete and from which folders before confirming.
- Custom Database Support Supports winapp2-compatible databases from other sources or allows you to write custom .ini rules and select paths in the settings page.
- Junk Growth Tracker records the history of each cleaning session, including the date, reclaimed storage capacity, and number of deleted items, to monitor junk file accumulation trends.
- Portable, no installation required. Simply extract the ZIP file and open FCleaner.exe for immediate use, without modifying the registry or leaving traces in the system.
- The Analyze button instantly changes to Cancel when a scan or cleaning starts, allowing you to stop the process at any time.
- Up to 28x faster scanning. Powered by a new algorithm that detects items with multiple file patterns simultaneously in a single pass without looping through each type individually.
- AI-powered item descriptions via Groq help translate Winapp2 items into plain language to understand the origin and function of files before deletion (requires a Groq API Key and manual activation in the settings page).
- Extensions A centralized hub for supplementary tools such as Chris Titus Tech Debloat Tool, Clear Icon Cache, Explorer Tweaks, and Remove Windows AI.
- Control via Terminal using the /AUTO parameter for scheduled background cleaning without opening the main window.
What's new
Version 26.11.01
- Tabbed window interface Replaces the hamburger menu and sidebar navigation with File Explorer-style tabs, where each tab retains its previous scan results. The + button opens a Cleaner, Terminal, or Custom tab in a single click, and Settings opens in a separate, non-overlapping tab.
- Full-width breadcrumb address bar allowing you to click back through individual sections, featuring a back button and reload button specific to the active tab, alongside a search box and right-side menu.
- More compact results table Reduces result row height to 26px (from 50px) with a 28px column header that supports sorting. Replaces the previous accordion view with simultaneous display of category trees and items, showing both file size and path on a single screen, complete with a summary status bar at the bottom.
- Customized the title bar instead of using standard controls, and resolved the issue where the […] button was obscured by the scrollbar on mouse hover.
- Some new text remains entirely in English prior to scheduled translation into 17 additional languages in the next build, and the result tree column width is not adjustable in this version.
file information
- Operating System Windows 11 / 10 (64-bit only)
- License : Freeware (MIT License)
- Developer Builtbybel (GitHub)
- Language : England
- File size : 48.29 MB
- File type *.zip (Portable, no installation required)
- Updated on : 13/11/2026
- Need to read: Download Guide
Note: FluentCleaner is primarily developed and distributed via GitHub, without a separate official website. It is recommended to download directly from the GitHub Releases page for security and to ensure you always receive the latest version.
