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Rename files with regular expressions
Regex renaming is useful when file names follow a pattern but simple text replacement is not enough. Renamio helps you test the pattern against sample files before applying it to the whole batch.
Best for
Use this when file names follow a pattern and you need capture groups, token reordering, or more precise matching than plain text replacement.
Rename examples
Extract dates
IMG_2024-01-15_photo.jpg
2024-01-15-photo.jpg
Reorder tokens
file001-backup.txt
backup-001.txt
Normalize patterns
Document(1).pdf
Document-1.pdf
Common use cases
- Extract sequence numbers, dates, or IDs from mixed file names.
- Reorder tokens with capture groups.
- Convert inconsistent naming patterns into one format.
How to use it
- 1Write a regex pattern that matches the old file name.
- 2Use replacement text with capture groups.
- 3Inspect the preview before applying the rename.
FAQ
Does regex renaming support capture groups?
Yes. Regex replacement can use capture groups to preserve, reorder, or remove parts of a file name.
Is regex safe for large batches?
Use the preview first. Renamio shows the proposed new names before the batch operation is applied.