How to Join .001 & .002 Files


Split files are often given extensions like ".001" and ".002" to indicate that the files are parts of a whole. The file splitting/merging utilities that are used to create the files must be used to rejoin the pieces -- the individual pieces are useless on their own. If you've received files with similar extensions indicating parts of a larger, split file, you'll need a file splitter/merger to reassemble your file(s).


  • Download a free copy of HJSplit. Extract the program from its ZIP container and launch it. Double-click on the ZIP file to open its folder; drag and drop the HJSplit file onto your desktop for use.

  • Double-click on the HJSplit icon to launch the program. Click on the program's "Join" heading. Click on the "Input File" button in the "Join" menu. Locate the split files -- the ones with with the .001-type extensions -- that you want to join using the file explorer window that appears.

  • Click on the "Start" button in the "Join" menu to begin merging your split files. The rebuilt file will be stored in the same folder in which the split pieces resided.

File Splitter

  • Download a free copy of File Splitter. Extract the file from its ZIP container; double click on the file to open it. Drag the "Splitter" folder out onto your desktop.

  • Open the "Splitter" folder, and then launch the "Splitter" program file. Click on the program's "Join" button.

  • Locate the split files that you want to join using the file explorer window that appears. Click on the first file, and then click "Open" to begin joining it with its other pieces.

Simple File Joiner

  • Download and install a free copy of Simple File Joiner. Launch Simple File Joiner after you've installed it.

  • Drag and drop all of your split files into the program's main window. Click on the "Sort List" button to organize your files.

  • Click on the "Join" button to begin reassembling your file.

Tips & Warnings

  • Place all related .001-type extension files into the same folder; you can move the files to an existing folder (even if the folder has other files) or you can create a new folder for them.

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