Batch renaming helps when a folder contains dozens of files with the same unwanted prefix or an inconsistent label. Fileso provides replace and insert modes so you can change the names together and inspect a preview before applying the rule.
Select a small test group first
Open the local folder, select the files to change, and choose Batch Rename from the available file actions. Begin with a few representative names, including one that should stay unchanged. That makes overly broad rules easier to spot.
Renaming changes filenames. It does not convert file contents, alter image dimensions, or rewrite metadata inside a document.
Replace a repeated part of each name
- Choose Replace mode.
- Put the existing text in Search and the desired text in Replace.
- Leave Use Regex off for a literal replacement.
- Keep Include File Extension off when only the name should change.
- Inspect every proposed result in Preview, then select Rename.
For example, replacing draft_ with review_ turns draft_notes.pdf into review_notes.pdf. A file without the search text should remain unchanged.
Add a prefix or suffix
Choose Insert, enter the text, and select Start or End. With extensions excluded, an end insertion adds text before the extension: report.pdf can become report-approved.pdf.
If Include File Extension is enabled for an end insertion, text can be placed after the full filename. Review that option carefully so you do not accidentally make a file harder to recognize or open.
Use regular expressions deliberately
Regex replacement is useful for patterned names, but a short expression can match more files than expected. Test it on copies and check the preview rather than assuming the pattern means what you intended. Avoid rules that turn multiple inputs into the same output name.
Can changing an extension fix a format?
Changing .png to .jpg only changes the name. To make a real JPEG, use image conversion. The same distinction applies to documents and archives. Keep a copy or a record of important original names when they are referenced by a project, playlist, or other file.
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