Folders rarely contain just one type of file — a project directory might mix images, documents, and spreadsheets together, or a photo export folder might include both the main images and separate thumbnail or sidecar files you don't want touched by the same renaming rule. File Mask Filter lets you narrow down exactly which files in a loaded folder are affected by your renaming rules, using wildcard patterns to match by extension, filename pattern, or both.
This means you can load an entire mixed folder and apply a renaming operation only to the ".jpg" files while leaving ".raw" or ".xmp" sidecar files completely untouched, or target only files matching a specific naming pattern like everything starting with "DSC_" while ignoring files that don't match. Rather than manually selecting individual files or moving them to separate folders first, the mask filter handles the targeting for you as part of the same workflow.
This is particularly useful for photographers and videographers working with paired files — RAW images alongside JPEG previews, video files alongside thumbnail exports — where renaming rules need to apply selectively rather than uniformly across every file type present in the folder.
- Install Turbo Bulk Renaming Tool on your Windows PC.
- Open the app and load the folder containing your mixed set of files.
- Enter a file mask pattern using wildcards, such as "*.jpg" to match only JPEG files or "DSC_*" to match files starting with that text.
- Confirm the file list updates to show only files matching your specified mask.
- Apply your renaming rules as normal, knowing they'll only affect the filtered files.
- Check the live preview to confirm only the intended files are being renamed.
- Click Rename to apply your changes to just the filtered subset of files.
- Wildcard pattern matching by extension, filename pattern, or both
- Apply renaming rules to a targeted subset of files within a mixed folder
- Avoids the need to manually move or separate files by type before renaming
- Especially useful for paired files like RAW and JPEG, or video and thumbnail exports
- Live preview confirms exactly which files match your mask before you commit any changes
- Runs fully offline, keeping your file names and folder structure private during the process
What wildcard characters does the file mask support?
Standard wildcard characters like the asterisk for matching any sequence of characters are supported, similar to the file search patterns used in Windows Explorer.
Can I combine multiple file masks in one operation?
You can specify mask patterns to target the specific file types or naming patterns you need, refining your selection before applying any renaming rules.
What happens to files that don't match my mask?
Files that don't match the specified mask are excluded from the current renaming operation and remain completely untouched.
Does File Mask Filter work together with sub-folder scanning?
Yes, you can combine a file mask with recursive sub-folder scanning to apply targeted renaming rules across an entire folder tree, affecting only the files that match your pattern.
Ready to rename your files in bulk, offline, with full privacy?