Free & Open Source · WinUI 3 · Windows 11

FluentCleaner —
free junk cleaner for Windows 11.

The open-source app that removes junk files, browser cache and temp data on Windows 11 — in seconds. No ads, no subscription, no registry tricks. Built with WinUI 3, MIT licensed, by builtbybel.

100%Free forever
0Ads or trackers
WinUI 3Native Windows 11
Cleaner — analysis
Windows 11 Pro 25H2 · Intel Core i7-13700T · 32 GB RAM
Microsoft Edge
Applications
Citrix Receiver0 B
Dynalist Obsidian0 B
HP0 B
Microsoft NuGet Cache
Microsoft Office0 B
Analysis results 107.0 MB
Microsoft Edge Caches
686 files
6.5 MB ›
Edge Security Detection
1 files
5.2 KB ›
Edge Telemetry
5 files
17.4 KB ›
Edge Web Storage
16 files
1.4 MB ›
Microsoft Visual Studio
11 files
17.0 MB ›
Intel Shader Cache
4 files
102.5 KB ›
Is FluentCleaner safe? — Yes, MIT licensed
No registry cleaning
Free forever, no upsells
Open source — github.com/builtbybel

Your Windows 11 PC is slower than it should be — this Fluent Cleaner fixes that.

Every browser session, every Windows update, every game launch leaves megabytes of junk behind. Browser caches, Windows temp folders, app leftovers and GPU shader caches add up to several gigabytes per year that serve zero purpose. The app removes them safely in one pass — no registry tricks, no system risk.

The fluent cleaner download targets exactly the right cache directories — Microsoft Edge, Chrome, Firefox, Windows %TEMP%, Visual Studio NuGet, Intel/NVIDIA shader caches — without touching system files. Average scan: under 30 seconds.

GB+
Typical browser cache accumulation per year
1000s
Orphaned temp files per Windows update cycle
0
System files touched — only confirmed junk is removed
< 30s
Average scan time on Windows 11

Everything you need.
Nothing you don't.

Built from scratch for Windows 11. No dark patterns, no upsells — just a cleaner that actually works.

Multi-Database Engine

Scans deeper than single-pass cleaners. Targets browser caches, Windows %TEMP%, app leftovers and GPU shader caches in one pass.

Multi-database

CLI Terminal Control

Run the app headlessly via terminal. Automate cleaning in scheduled tasks or scripts.

CLI support

Safe by Design

Intentionally skips registry cleaning. Only confirmed junk is removed — your system stays stable.

No registry risk

Zero Telemetry

The app never phones home. No analytics, no crash reports. Fully offline, air-gap compatible.

100% private

Native WinUI 3 Interface

Built exclusively for Windows 11 using Microsoft's WinUI 3. Mica material, rounded corners, adaptive layout — feels native to your OS.

WinUI 3 · Fluent Design

Three steps to a cleaner PC — fluentcleaner download

01

Get the fluentcleaner free download

Grab the app from the builtbybel GitHub releases page. One click — no installer tricks, no bundled software.

02

Run the scan

The multi-database engine scans browsers, Windows temp folders, app caches and shader stores in under 30 seconds.

03

Review & clean

Check results by category, deselect anything you want to keep, hit Clean. Done.

Common questions

Need more help? Open an issue on the builtbybel GitHub repo.

Ask on GitHub →
Is FluentCleaner safe?
Yes. The app is open-source under MIT licence — every line is auditable on GitHub. It only targets known junk locations (browser cache, Windows temp, app caches, GPU shader caches) and never touches the registry. No telemetry, no network calls.
Is it really free?
100% free, forever. No premium tier, no Pro upsell, no subscription. Published under MIT licence on the builtbybel GitHub releases page.
Where do I download fluentcleaner?
The official download is on github.com/builtbybel/FluentCleaner/releases. Always grab it from there — third-party mirrors may bundle adware.
Why doesn't it clean the registry?
Deleting orphaned registry keys is almost never worth the risk. Modern Windows recovers gracefully from leftover keys, but a wrong deletion can break applications. The app intentionally skips this to keep your system stable.
Does it work on Windows 10?
The app is built for Windows 11 using WinUI 3. It runs on Windows 10 if the WinUI 3 runtime is present, but the Mica and Fluent Design polish is optimised for Windows 11.
Windows 11 · WinUI 3 · MIT Free

Download fluent cleaner — free forever.

Join thousands who switched from bloated cleaners. Open-source, MIT licensed, built by builtbybel.