Replacing a character in a file name

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Posted on by OS-04080718-0

Hello dear colleagues,

I need to create a flow in Power Automate that will handle the following. For example, I would like to check once a week the files added to a SharePoint library, and when it turns out that someone has uploaded a file with spaces in its name, it will replace those spaces in the file names with underscores “_” (e.g., plik testowy 123 → plik_testowy_123).

Important! This should apply only to files, not folders.

I have already tried a few methods, including an HTTP request to SharePoint, but it’s been going rather slowly for me. Does anyone have a concept of what such a flow should look like from start to finish?

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Building flows

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Vejai SH 555 on at

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Hi @OS-04080718-0,

How many folders and file you have to rename every run?

Your flow will look like this.

Thanks,

Vejai SH

Please mark as answer if my suggestion helps you.

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Ellis Karim 11,691 Super User 2025 Season 2 on at

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@Vejai SH,

Thanks for posting.

You can use the FSObjType to refine the flow further, to find files only:

FSObjType eq 0 will return Files only
FSObjType eq 1 will return Folders only

See: Power Automate: Get Only Files (Exclude Folders) from a SharePoint Library – Ellis Karim's Blog

Ellis Karim
elliskarim.com | LinkedIn | Bluesky
If this solved your issue, please mark it as ✅ Accepted Answer. If it helped, feel free to give it a 🩷 Like!

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Tomac 3,951 Moderator on at

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In addition to what @Ellis Karim and @Vejai SH posted (both correct), you'll also need to look for and replace "%20" since space characters may have gotten replaced with the HTML code for a space at some point.

Please remember to mark as correct the comments which helped resolve your issue.

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