Fast drive scans
Direct NTFS Master File Table access keeps scans fast, even on large drives with many files.
Free disk space finder for Windows
SizeTrend
See what is using disk space, what changed, and what you can safely clean up—all in one place.
After each scan, SizeTrend brings the likely causes to the surface: the largest folders, unusually large files, recent growth, system-managed storage, and practical cleanup actions.
- SizeTrend 2.1
- Windows 10 and 11
- Fast NTFS MFT scans
- Standalone or installer download
Finding big files is easy. Discovering lost space is the hard part.
SizeTrend is built for the cases where free space disappears and the usual file browser view does not explain why. Its Overview panel puts the likely causes in front of you, including the largest folders, unusual files, system-managed storage, recent growth, and cleanup opportunities.
Save a scan, compare it later, and see only the files and folders that changed.
Search by file name, text, or binary content; list files by size, date, or type; find duplicate files; and compress files or folders in place when you know what can be safely reduced.
Understand what changed
Compare saved scan snapshots or filter by recently created and modified files to explain missing space.
See what you can clean up
SizeTrend gathers likely cleanup opportunities in one overview, explains what they are, and puts the appropriate cleanup, review, or uninstall action within easy reach.
Overview
See where space went—and what you can clean up
You should not have to recognize or hunt through obscure Windows and application folders. After a scan, the Overview panel brings together reclaimable space, storage worth reviewing, large installed applications, recent growth, and the folders and files having the greatest impact. Each recommendation explains what it found and uses the appropriate Windows or application cleanup tool when direct deletion would not be safe.
Scan
See disk usage quickly
SizeTrend reads the NTFS Master File Table directly, so a scan can complete quickly without asking Windows to enumerate every folder one at a time.
Search
Find files by name, content, type, size, or date
Use SizeTrend when you know part of a filename, need to search text or binary file contents, or want to narrow results to recent files and large file types.
Duplicates
Spot duplicate files before they waste more space
Find duplicate files by name, size, or content, then make cleanup decisions with the same drive context used for the scan.
Compare
Track what changed between scans
Save the current scan, compare it later, and SizeTrend shows the difference between the old and current state instead of making you inspect the whole drive again.
Why SizeTrend?
| Feature | SizeTrend | WinDirStat | WizTree | TreeSize Free | TreeSize Prof |
|---|---|---|---|---|---|
| Ultra-fast scans using NTFS Master File Table | ✔ | ❌ | ✔ | ✔ | ✔ |
| Scan as non-elevated user without admin rights | ✔ | ✔ | ❌ | ✔ | ✔ |
| Compare to a past scan snapshot | ✔ | ❌ | ❌ | ❌ | ✔3 |
| Filter scans by date or file type | ✔ | ❌ | ✔1 | ✔ | ✔ |
| Find files or folders by name | ✔ | ❌ | ✔1 | ✔ | ✔ |
| Text file content search | ✔ | ❌ | ❌ | ❌ | ✔ |
| Binary file content search | ✔ | ❌ | ❌ | ❌ | ❌ |
| Find duplicate files | ✔ | ❌ | ❌ | ❌ | ✔ |
| Zip or compress large files or folders with one click | ✔ | ❌ | ❌ | ❌ | ✔2 |
| List files by size or date | ✔ | ❌ | ✔ | ❌ | ✔ |
| Show space taken by file types | ✔ | ❌ | ❌ | ❌ | ✔ |
1 File name filter only, no filtering by date. 2 Compress only; zipping is only available as a bulk operation. 3 Typical time to save an SSD drive scan: 1 hour or more for a 600 MB SQLite file or 10 seconds for a 300 MB folders-only XML file, compared to SizeTrend's 5 seconds for a 90 MB full scan file.
When a drive slowly fills up, SizeTrend shows what changed.