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1Tree is a 100% FREE software that 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 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. So, with 1Tree Basic, you can do the manual disk cleaning work easily.

In fact, it is similar to UNIX/Linux du command, or you can think it is a GUI du tool for Windows.

# Support 1Tree (100% FREE)

1Tree is 100% Freeware, if you think it is good, it's welcome for you to support it by Making Donation, Writing Article or Comment, Recommending to Friend and Linking to Your website.

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# See Resource Size

After started, 1Tree Basic will load all drives and the first level resources of the smallest size used drive. Clicking a resource (drive/folder) will load its first level resources (files/folders).
Also, you can see the size tree for the remote computers by the mapped network drives (do not forget turn on the related switch on the Preferences interface).

# Perform Operations

And you can perform some operations for the selected resource (drive, folder and file) by clicking toolbar buttons or context menu items, such as Permanently Delete, Move to Recycle Bin, Copy to, Rename, Move to, Copy Full Path, Run, Open and Display Property.

# Set Preferences

1Tree Basic also provides you with a few options to customize the interface, such as Tree Font, Toolbar Location and Data Separator (splits the name and size for each resource), Show CD / Network Drive(s). And you can preview the effect for Tree Font and Toolbar Location options before save them.
Supports Deutsch, English, Français, Nederlands, Norsk, Polski, Slovenščina, العربية, 简体中文, 繁體中文.
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Mit 1Tree Basic können Sie schnell die Größen aller Laufwerke/Verzeichnisse/Dateien in einer Baumstruktur anzeigen/aufrufen, damit Sie eine manuelle Festplatten-Reinigung problemlos durchführen können. 1Tree Basic lädt Ihre lokalen und Netzlaufwerke, Ordner und Dateien mit ihren Größen (sortiert nach Größe in absteigender Reihenfolge) und bietet Ihnen die üblichen Befehle (z.B. Löschen, Verschieben, Umbenennen) und einige spezielle Befehle (z.B. Vollständigen Pfad der Ressource holen) für Laufwerke/Ordner/Dateien . Mit 1Tree Basic können Sie also die manuelle Festplattenreinigung einfach durchführen. In der Tat werden Sie denken, es ähnelt den Befehlen von UNIX/Linux, aber es ist ein Benutzer-Oberflächen-Werkzeug (GUI-Tool) für Windows. Hauptmerkmale: Größe der Ordner anzeigen. Nach Größe sortieren. Intelligente Byte-Größen-Einheiten. Intelligente Dezimalstellen. Gemeinsame Befehle. Vollständigen Pfad kopieren. Anpassbare Benutzer-Oberfläche.

Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018


1Tree (GRATUIT) affiche rapidement en arborescence la taille de tous les lecteurs/répertoires et fichiers, ce qui facilite le nettoyage des disques. 1Tree Basic analyse les disques, puis affiche la taille des lecteurs, dossiers et fichiers locaux et réseaux (tri en tailles décroissantes). L'utilisateur peut ensuite faire les opérations habituelles (supprimer, déplacer, renommer) ainsi que d'autres (obtenir le chemin complet d'un lecteur, fichier ou dossier). Le tout est comparable à la commande "du" d'UNIX/Linux ou à une interface utilisateur graphique (GUI) de "du" pour Windows. Points forts : affichage des dossiers, tri par tailles, unité intelligente, décimale intelligente, opérations usuelles, copie du chemin entier, interface personnalisable.

Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018


1Tree (100% gratis) toont U snel alle ruimte van mappen en bestanden per boom,zodat U makkelijk handmatig de disk kunt opschonen. 1Tree Basis laadt Uw locale en netwerk disks,mappen en bestanden met hun grootte (gesorteerd op afnemende grootte), en levert u de gebruikelijke bewerkingen voor disks/mappen/bestanden (bv.Verwijder, Verplaats, Hernoem) en enkele speciale (bv. Haal het volledig pad op). U kunt dus met 1Tree Basic makkelijk handmatig disks opschonen.Het lijkt in feite op het 'du' commando van UNIX/Linux u kunt het beschouwen als een grafisch 'du' gereedschap voor Windows. Mogelijkheden: Toon map grootte. Sorteer op grootte. Intelligente Eenheid. Intelligent Decimaal. Basis Commando's. Kopiër volledig Pad. Aanpasbaar Interface.

Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018


1Tree (100% GRATIS) lar deg raskt se stasjoner/mapper/filers størrelse i 1 tree visning, for å lettere holde orden på din harddisk. 1Tree Basic laster dine lokale stasjoner og nettverksstasjoner, mapper og filer med deres størrelse (sortert på størrelse i synkende rekkefølge), og gir deg de vanlige kommandoene (f.eks. Slett, Flytt til, Endre navn) og noen få spesielle kommandoer (f.eks. Fullstendig sti til innholdet) for stasjoner/filer/mapper. Så, med 1Tree Basic, kan du lettere holde orden på din harddisk. Faktisk ligner det på UNIX/Linux du-kommandoer, eller du kan tenke på det som et GUI du-verktøy for Windows. Nøkkelfunksjoner: Vis mappestørrelse. Sorter på størrelse. Intelligent enhet. Intelligent desimal. Vanlige kommandoer. Kopier full sti. Tilpasningsvennlig grensesnitt.

Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018


1Tree Basic vam omogoča, da hitro vidite/dobite vse velikosti imenikov/datotek v 1 drevesu tako, da vam omogoča enostavno dečo pri ročnem čiščenju diska. 1Tree Basic naloži vaše lokalne in omrežne pogone, mape in datoteke z njihovimi velikostmi (razvrščeno glede na velikost v padajočem vrstnem redu) in vam zagotavlja skupne ukaze (npr. Izbriši, Premakni, Preimenuj) in nekaj posebnih ukazov (npr. Pridobiti celotno pot vira ) za pogone/datoteke/mape. Torej, z 1Tree Basic, lahko enostavneje ročno počistite disk. Pravzaprav je podoben ukazu UNIX/Linux du ali mislite, da je to orodje GUI du za Windows. Ključne lastnosti: Prikaži velikost map. Razvrsti po velikosti. Inteligentna enota. Inteligenten decimalni prikaz. Skupni ukazi. Kopiraj celotno pot. Prilagodljiv vmesnik.
QuoteIt does exactly what it says: It lists your drives, folders and files by size; D/L was quick, installed easily, and registered without missing a beat. Very simple to see and use and if that is what you are looking for, this program is right. - By Axiomia
QuotePerformance is very waiting for it to identify files and switching folders is very fast. As such, this becomes a much more usable and informative utility. - By Paul
QuoteInstalled without problem on 64bit/Win 7. Its a nice little utility to help you tidy things up, I found it to be straight forward to use and does what it sets out to do well. I'll keep it tucked away in my utilities folder for those times when I want to do a bit of housekeeping. - By Marineboy
QuoteInstalled very smoothly, activated without a problem. Though many here will say that it is too simple a program, yet, I find it very useful, straight forward to be used as an explorer, with just the basic functions I need. What I like most is the choice of font for the Tree, and also the large icons of the toolbar. That is less straining for my eyes. I have refrain since time past many softwares, no matter how useful it is, just because of poor visibility, not having the choice to choose different font. Thank you Trisun Software. - By Andrew
QuoteOne of the most needed software I've ever seen. Thanks!!! - By adam
QuoteThis is a neat little program, it's fine. It's like having a table of contens of your compters hard disks. It even lists external hard drives. - By Arnie
QuoteThanks 1Tree. Installed easy. Runs perfect(win8). very helpful in keeping track of storage space. I see people have their complaints above, but I would actually say that this software would be in my top 3 giveaways of the last couple months. Mr. Happy is very happy today :) - By Mr. Happy
QuoteThumbs-Up - Downloaded and installed with no probs.Is a simple program that does what it is meant to. I like the graphic display, and you can increase the font size which is a excellent idea that suites me just fine. I will keep this as a handy little add-on to navigate my way through a ton of files and folders i have collected - By Mr. paul
Download82 Editor's Pick Compatible with Windows 10 Compatible with Windows 8 Compatible with Windows 7 100% Clean

BitsDuJour's Review

QuoteQuickly Visualize Directory Sizes in Tree View

Sure, you'd like to free up some hard drive space by getting rid of some of your larger folders, but finding the worst offenders can be tedious. Short of checking the properties for each and every directory in your system, what can you do? Well, it all starts with today's discount software promotion, 1Tree Basic!

1Tree Basic makes it easy to quickly see the sizes of all of your directories in a convenient tree view, making it a simple task to recapture disk space. With 1Tree Basic, not only will you see your drives, folders, and files sorted by size, you'll also be able to use some of the most common commands like Delete, Recycle, Copy, Move, and more. You'll enjoy a plethora of different view options, including showing the size of folders, sorting by size, and copy full path.

Like all outstanding software, 1Tree Basic lets you customize the interface and shortcuts to match the way that you work. Deploy desktop and quick launch icons for quick and easy access. Change the font that your tree displays. Or, you can elect to have 1Tree Basic run in Autostart mode, so you'll always have it ready and waiting for you!

Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018

Software Guy's Review

QuoteNice interface and handles most basic file manipulations (move, copy, delete...).

File sizes and folder sizes displayed is very handy-particularly folder size for burning dvds. Would like to see checkboxes for bulk file moves where the selected function is performed on the selected files.

TriSun is providing lifetime upgrades which is very good. If you need file size info and folder size info up front, this is a good choice for a basic file manager.

Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018

Softpedia's Review

Quote1Tree Basic is a handy and reliable application designed to enable you to quickly get the sizes of all directories/folders in one tree.

The program features a simple interface which allows you to browse your hard drive, delete large files or relocate them to other partitions with minimum effort.
Release/Update Date
Features / Improvements Bug Fixes
May 29, 2018
  • Important (I): changed the default font of the tree view to Segoe UI, 9pt.
  • I: publish it as freeware.
  • I: fully supports native Slovenščina.
  • I: fully supports native Deutsch.
  • I: can expand the content after clicked the "Online help" menu item (in previous versions, just only jump to the 'Instruction' segment, but have not expanded it, you need to expand it manually to see the instruction).
  • Moved the "Move to Recycle Bin" button to the left of the "Permanently Delete" button.
  • Added "Update history" function to the "Help" menu.
  • Optimized software texts.
  • Optimized internal efficiency.
Nov 10, 2017
  • Important (I): shows the progress and tells you what it is doing on the Splash (start) interface, to avoid that you thinking the program does not respond. Greatly improved the friendliness.
  • I: supports multi-language.
  • I: fully supports native Simplified Chinese, traditional Chinese, Polish and Arabic languages.
  • Open translation interface for multi-language version.
  • Optimized internal efficiency.
  • Optimized the "request remote support" feature - links to company site directly, in order to avoid clicking the mouse twice and jumping the page again.
  • Preferences interface: added shortcut keys for all elements.
  • Changed the splitter color from black to gray for About and Preferences interfaces to make it friendlier.
  • I: cannot compute the size for a few system folders, in previous versions, display as "Cannot Compute Size".
Oct 15, 2015
  • Important: perfected UI effect for any system DPI setting, in any supported Operating Systems (system DPI setting: in Windows 7, it can be changed at "Control Panel -> Appearance and Personalization -> Display -> Make text and other items larger or smaller").
  • Important: supports Windows 10.
  • Important: uses Golden Ratio for the start position of the main and splash interfaces.
  • Optimized internal efficiency.
  • Optimized the definition of some icons/images.
  • Redesigned the licenses.
  • Optimized Help menu.
  • Optimized software texts.
  • Beautified About interface.
Jan 27, 2014
  • Can open any resource by using double-click, previous versions can only open file.
  • Uses new domain name ( for 1Tree products.
  • After did Move to Other Place, Permanently Delete or Move to Recycle Bin operation, the resource tree may not be updated if there is exception.
  • After pressed <Enter> on the system dialog boxes, the selected resource will be opened.
Dec 26, 2013
  • Added feature: can rename the selected resource.
  • Added feature: can run/open the selected resource by using the <Enter> key.
  • Added options: show the network / CD drive(s).
  • Uses the specific icon for the network drive(s).
  • Displays the right label for the network drive(s).
  • Sorts drives by used size, not the total size.
  • Uses the thousands separator in size.
  • Prompts you to refresh whole resources tree after registered, else you will not see the 5+ levels size.
Dec 14, 2013 (Update)
  • A little interface problem on Options window (hidden text).
Nov 26, 2013
  • Changed the portable package to the installer.
  • Does not use SQLite to save user settings, greatly reduced the installer size.
  • Optimized the structure of internal resources, also reduced the installer size.
  • Beautified/Optimized the text and images of software and webpage.
Feb 29, 2012
  • Supports context menu.
  • Supports reloading the selected resource.
Sep 26, 2011
  • Displays prompt when loading resources.
Nov 15, 2010
  • Supports specifying data separator (splits the name and size for each resource).
  • Supports moving resources to the Recycle Bin.
  • Does not check if the resources are stored in ROM drive when executing 'Delete' and 'Move to' operations.
May 23, 2010
  • Now can get the full path of the selected resource.
Oct 27, 2009
  • Does not create desktop and quick launch icons automatically, but made them as options.
  • Does not reload the target folder after did 'Copy to Folder' command.
Feb 12, 2009
  • New release.

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Subject: Recommend 100% FREE software - 1Tree: quickly see folders size in 1 tree! (from 'your name here')


I'm using 1Tree, it's a cute Windows tool that enables you quickly see folders size in 1 tree view, so as to let you to do the manual disk cleaning work easily.

You should have a test!

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Direct download:
Download Download 1Tree v6.0 for Microsoft® Windows®, 354 KB, Updated at Jul 14, 2018