Disk Space Analyzer for Windows — Find What's Taking Space

Three steps

How to find what's hogging your drive.

Three simple steps and you'll know where your disk space went.

Open DiskLensUnzip the downloaded file and run it—no installation needed.
Pick your targetPress Browse and select the drive or folder you want to analyze.
Start the scanPress Scan and wait a few seconds for the results to load.
Read the resultsLook at the list—the biggest space consumer is on top, and every folder shows its true total size.

Real results

See your entire drive mapped to size.

DiskLens gives you a clean, sorted list where the largest space hog sits at the top. Folder sizes include everything nested inside them, so you're looking at real numbers, not deceptive totals.

Biggest items firstEverything is sorted by actual disk space, so you spot the problem folders instantly.

Real folder totalsWhen a folder says it takes 50 GB, that includes all subfolders and files inside it.

Readable at a glanceSimple list, clear sizes, no charts or confusion—just the data you need.

vs. online tools

How DiskLens compares to online tools.

Web-based analyzers promise convenience but come with real drawbacks.

DiskLens

Privacy — Runs locally, no uploads
Setup time — Unzip and run instantly
Ads and tracking — Completely clean
Works offline — Full functionality
Cost — Free, open source
System demand — Minimal, any machine

Typical online tool

Privacy — Sends data to server
Setup time — Login, permissions, waiting
Ads and tracking — Usually present
Works offline — Requires internet
Cost — Free tier limited
System demand — Browser overhead

Built different

Why DiskLens finds what other tools miss.

Most space checkers hide behind ads or require setup; DiskLens cuts straight to the point.

Zero bloat, instant run

Download a small file, unzip it, and click to start scanning. No installer, no registry changes, no waiting for setup to finish. Works on old and budget machines just as well as new ones.

Accurate folder math

When you see a folder size, it's the real total of everything inside—subfolders, hidden files, all of it. You won't waste time chasing phantom space.

Your data stays yours

Everything runs on your PC. Nothing leaves your machine, there's no telemetry, no ads creeping into the scan results, and no account to create.

Read-only by design

DiskLens shows you what to delete but never deletes anything on its own. You stay in control of what happens to your files.

Got questions

Questions about DiskLens.

Will DiskLens delete files for me?

No. It shows you what's taking space but never touches your files. You decide what to delete.

Do I need admin rights to run it?

No. DiskLens works on standard user accounts. It doesn't modify the registry or install anything system-wide.

Can I scan external drives and USB sticks?

Yes. Use the Browse button to pick any connected drive or folder, and DiskLens will scan it the same way.

How long does a scan take?

Usually a few seconds for a local drive, depending on the number of files. Older machines may take longer, but it's still fast.

Is my data sent anywhere?

No. DiskLens runs entirely on your PC. Nothing is uploaded, and there's no telemetry.

What Windows versions does it support?

Windows 10 and 11, 64-bit. It runs on budget and older machines without issues.

Why is DiskLens free?

It's open source under the MIT license. The code is public, and anyone can use, share, or modify it freely.

Find what's taking up disk space.