1Tree: Disk Space Usage Analyzer

Key Features

• 1Tree (100% FREE) lets you quickly see all drives/directories/files size in 1 tree view, so as to let you to do the manual disk cleaning work easily.
• 1Tree Basic loads your local and network drives, folders and files with their sizes (sorted by size in descending order), and provides you with the common commands (e.g.
• Delete, Move to, Rename) and a few special commands (e.g.
• Get Full Path of Resource) for drives/files/folders.

Technical Specifications

• **Publisher:** https://1tree.info/basic.htm
• **License:** Freeware
• **Operating System:** Windows 7, Windows 8, Windows 10, Windows 11
• **Last Updated:** October 15, 2025
• **Category:** Utilities / File Cleanup