# Best Free Tools to Clean Junk Files on Windows
Keeping your Windows PC clean and fast is not just about deleting a few files. Over time, your system collects temporary files, cache, leftover program data, browser junk, update residue, and hidden clutter that slows everything down. If your PC takes too long to boot, apps feel heavy, or your storage keeps filling up for no reason, it’s time for a deep clean. The good news is that you do not need paid software. Many free tools can clean junk files and boost performance safely and effectively.

This article explains the best free junk-cleaning tools for Windows, how they work, and why using them regularly improves system speed. The goal is to help you choose the right tool and keep your PC running like new.

## Why Cleaning Junk Files Matters

Windows creates many temporary and background files every day. Some are helpful for short-term processes, but most become useless over time. When this junk piles up, several problems start:

Slower startup time
Low storage space
Lag in opening apps
Browser freezing
System crashing or hanging
Overall slow performance

Cleaning junk files removes unnecessary load from the system and frees resources for faster processing.

**1. Microsoft Storage Sense**

Storage Sense is a built-in Windows feature that automatically cleans temporary files, old downloads, update leftovers, and Recycle Bin data.

Key Features:
Automatic cleanup option
Deletes temporary system files
Cleans cloud-stored “offline” files
User-friendly and safe

Why It’s Good:
Because this tool comes built into Windows, it works smoothly without installing anything. It is safe and perfect for regular cleanup.

Best For:
Beginner users who want simple and automatic junk removal.

**2. Windows Disk Cleanup**

Disk Cleanup has been part of Windows for years and still works well for removing system-generated junk files.

Key Features:
Clears system cache
Removes leftover Windows Update files
Deletes old installation files
Frees large amounts of storage

Why It’s Good:
Disk Cleanup is lightweight and quick. It can remove gigabytes of update leftovers that slow down your PC.

Best For:
Users who want classic Windows utilities without installing third-party apps.

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**3. CCleaner Free Version**

CCleaner is one of the most popular junk-cleaning tools for Windows. Even the free version delivers powerful cleaning.

Key Features:
Deep system cleaning
Browser junk removal
Startup management
Registry cleanup

Why It’s Good:
CCleaner removes more hidden junk than built-in Windows tools and also improves system startup.

Best For:
Users who want a more detailed cleanup and extra performance features.

**4. BleachBit**

BleachBit is a free, open-source cleaning tool used by both regular users and professionals.

Key Features:
Advanced junk removal
Cleans browser cache for multiple browsers
Wipes free disk space
Removes temporary app data

Why It’s Good:
It performs deeper cleaning than many paid tools. It can clean more than 70 types of applications.

Best For:
Advanced users who want high-level cleaning and privacy protection.

**5. Wise Disk Cleaner**

Wise Disk Cleaner is a lightweight tool that removes junk files safely and quickly.

Key Features:
Fast scan and clean
Advanced cleaning mode
Disk defragment tool
Custom folder cleaning

Why It’s Good:
It is very easy to use and provides both basic and advanced cleaning options.

Best For:
Users wanting a combination of junk cleaning and disk optimization.

**6. Avast Cleanup Free (Basic Features)**

Avast Cleanup offers a free version with useful cleaning tools.

Key Features:
Removes leftover files
Cleans browser cache
Boosts startup speed
Good scanning accuracy

Why It’s Good:
It is completely free for basic cleaning and works well with all Windows versions.

Best For:
Users who want trusted security-brand cleaning tools.

**7. Glary Utilities Free**

Glary Utilities is an all-in-one performance boost and cleaning tool with multiple system utilities.

Key Features:
Junk file removal
Startup manager
Memory optimization
Browser cleaning

Why It’s Good:
It offers more control and extra optimization tools, making the PC feel faster.

Best For:
Users looking for extra system management features along with junk cleaning.

**8. Advanced SystemCare Free**

This is another well-known tool for complete PC cleanup and speed improvement.

Key Features:
Deep scan for junk files
Browser privacy cleaning
Startup optimization
Weak-point security scan

Why It’s Good:
The interface is modern and easy to use, and the cleanup is powerful.

Best For:
Users who want one-click cleaning with extra system checks.

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**9. Clean Master for PC (Free Version)**

Clean Master is originally famous for Android, but it also offers a free Windows version.

Key Features:
Fast junk scan
Removes hidden residual files
Improves performance
Safe for beginners

Why It’s Good:
It performs quick scanning and finds unnecessary temporary files easily.

Best For:
Users who prefer simple, fast cleaning.

**10. Krojam Cleaner**

A lesser-known but powerful junk cleaning tool.

**Key Features:**
Removes temporary files
Cleans browser junk
Lightweight and fast
Simple interface

**Why It’s Good:**
Because it is so light, it works well even on older PCs.

**Best For:**
Users with low-end devices needing light cleaning software.

**How to Choose the Best Tool for You**

If you want automatic cleaning → Choose Storage Sense
If you want classic cleaning → Disk Cleanup
If you want deep cleaning → CCleaner or BleachBit
If you want system optimization → Glary Utilities or Advanced SystemCare
If you want lightweight tools → Wise Disk Cleaner or Krojam Cleaner

**Tips to Keep Windows Clean and Fast**

Restart your computer at least 2–3 times a week
Delete large unused files regularly
Uninstall unnecessary programs
Clear your browser cache once a week
Run a cleanup tool every 7–10 days
Use cloud storage to avoid low space

**Final Words**

Using the right free tools to clean junk files can dramatically improve your Windows PC’s speed, performance, and storage. Whether you prefer built-in tools like Storage Sense or advanced cleaners like BleachBit and CCleaner, regular maintenance keeps your system healthy and running smoothly. By cleaning your PC every week, you extend its life and prevent slowdowns, crashes, and storage problems.