How to extract extension from filename in Excel?

Let’s say you have a list of filenames in a worksheet as left screenshot shown, and now you need to extract the extensions from each filename. How to solve it easily in Excel? In this article, I will introduce three methods to archive it.

Extract extensions from filenames with formulas

Extract extensions from filenames with Extract Text utility of Kutools for Excel

Extract extensions from filenames with Split Cells utility of Kutools for Excel

Easily extract all extensions from multiple filenames in bulk in Excel

With excellent Extract Text feature of Kutools for Excek, you can easily extract all extensions from all selected filenames in bulk in Excel as below screenshot shown.  Full Feature Free Trial 30-day!
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arrow blue right bubble Extract extensions from filenames with formulas

If you are familiar with Excel functions, you can combine the Right function, Find function, Substitute function and Len function to extract extensions from filenames. Please do as follows:

Select a blank cell next to the file names, and enter the formula =RIGHT(A2,LEN(A2)-FIND("|",SUBSTITUTE(A2,".","|",LEN(A2)-LEN(SUBSTITUTE(A2,".",""))))) into it, and then drag the Fill Handle to the range as you need. See below screenshots:

doc extract extension from filenames 2

Note: In above formula, A2 is the filename cell that you will extract extension from. And you can change it based on your needs.


arrow blue right bubble Extract extensions from filenames with Extract Text utility of Kutools for Excel

If you have Kutools for Excel installed, its Extract Text utility can help you extract extensions from filenames easily. Please do as follows:

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1. Select the filename cells that you will extract extensions from, and click the Kutools > Text > Extract Text.

2. In the opening Extract Text dialog box, type .*  into the Text box, click the Add button, and then click the Ok button.

Note: If there already has extract rules in the Extract list, please clear all the old rules except the new added one.

3. In the new opening dialog box, specify the first cell address of destination range, and click the OK button.

Now you will see all extensions of filenames are extracted and output into the specified range. See below screenshot:

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arrow blue right bubble Extract extensions from filenames with Split Cells utility of Kutools for Excel

Apart from Extract Text utility, you can also apply Kutools for Excel’s Split Cells utility to extract extensions from filenames. Please do as follows:

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1. Select the filename cells that you will extract extensions from, and click the Kutools > Text > Split Cells.

2. In the popping out Split Cells dialog box, check Split to Columns option, check Other option, type . into the below box, and click the Ok button.

3. In the second Split Cells dialog box, specify the first cell address of destination range, and click the OK button.

Now you will see the filenames column is split into two columns: filename column and extension column as below screenshot shown.

If necessary, please delete the new filename column based on your needs.

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Demo: extract extensions from filenames in Excel

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