JDiskReport v1.4.1

A Full Review of JDiskReport, a Free Disk Space Analyzer

The JDiskReport free disk analyzer program provides five different perspectives for understanding how files and folders are taking up disk storage space.

The program can scan a single folder — including Dropbox, Google Drive, and other synced cloud storage and online backup folders, as well hard drives and removable storage devices like flash drives.

JDiskReport is a good program to use since it will explain in detail where the largest files are being stored, unlike Windows, which is really only helpful in showing how much free space is remaining. After using JDiskReport, you'll be able to better decide what to do with those large files, like delete them or back them up to a different location.

This review is of JDiskReport v1.4.1. Please let me know if there's a newer version I need to review.

Our Thoughts on JDiskReport

JDiskReport v1.4.1

When you first open JDiskReport, you're given the option to scan any folder or drive that the operating system recognizes, including specific folders nested in other folders, as well as entire hard drives, including external hard drives.

We love that JDiskReport doesn't just list which files are biggest, but also gives you a few different ways to look at the data. You can find more details on those different perspectives in the next section below.

Even though it takes quite a bit of time to scan a large hard drive (which really shouldn't be a surprise), you can save the results to a JDR file so you can work through the results again later.

The colors and various other interface settings can be tweaked in the settings to give it a more customized look. We also like that you can make JDiskReport exclude one or more folders from the results.

JDiskReport lets you open a folder (which you can change in the options) but doesn't let you delete anything directly in the program. This could be a good thing so you don't accidentally remove valuable files, but it does require extra steps to remove large files.

How JDiskReport Works

The left side of the program shows all the folders while the right side explains what's using up the most storage. It does so in five ways, four of which you can view as a list, pie chart, and bar graph:

  • Size is the first tab and it shows the folders that are taking up the most space
  • The second describes the largest 50 files, and lets you sort them by size and date modified
  • The Size Dist tab shows how much storage is used up for files that are between certain size ranges, like "1 GB - 4 GB," "Over 16 GB," and others. This tells you whether the majority of disk space is occupied by large files or smaller files
  • The Modified tab is interesting because you get to see how often you're actually changing large files. For example, it might say that over 15 GB of data hasn't been changed in the past three months. This would be very useful so that you can move those files to a different hard drive or to a free online backup service, but this part of the program is only informative — you can't see which files it's referring to
  • The final Types tab reveals how much space each file type (like ZIP, MP3, etc.) is utilizing so you can take action if you realize that your drive is nearly filled with, say, video files

JDiskReport Pros & Cons

Although there are a few limitations in JDiskReport, we do like it for the most part:


  • Works on Windows, Mac, and Linux
  • Can scan a single folder or an entire hard drive
  • Includes several different ways to analyze the data
  • Can quickly copy the details of a folder to the clipboard
  • The entire scan result can be saved to a file


  • Much slower scan times than similar software
  • Unable to delete files/folders from within the program

If you're not sure that JDiskReport is what you're looking for, check out our other reviews of free disk analyzer software like Disk SavvyWinDirStat, and TreeSize Free.