# Batch Rename — Batch rename files on Mac

Rename many files at once with numbering, find and replace, prefixes or case changes. Part of OneMacTools, 151 private tools in one native Mac app (macOS 26 or later); category: Files. Runs on your Mac; nothing is uploaded.

Make renamed copies of files and folders: number them (Trip 01, Trip 02…), find and replace text, add a prefix or suffix, or change case.

Page: https://www.onemactools.com/tools/batch-rename · Download: https://www.onemactools.com/download · Pricing: https://www.onemactools.com/pricing

## How to use it
1. **Drop your files.** Drag in the files or folders to rename. For numbering, drag them up and down the list into the order you want.
2. **Choose how to rename.** Pick Numbering, Find & replace, Add prefix, Add suffix or Change case.
3. **Fill in the details.** The fields change with your choice: a new name and starting number, the text to find and replace, the text to add, or the case.
4. **Click Rename.** Renamed copies are made. File extensions are kept, so everything still opens in the same app.
5. **Check the names.** The copies are in a new dated folder in Downloads › OneMacTools. Open them with the Preview (eye) button or Show in Finder. Your originals keep their old names.

## Options
- **Rename by:** Numbering, Find & replace, Add prefix, Add suffix or Change case. The other fields depend on this choice.
- **New name:** Only shown for Numbering. The name every file gets, followed by a number: “Holiday” gives Holiday 01, Holiday 02 and so on. Empty uses “File”.
- **Start at:** Only shown for Numbering. The first number, 1 by default. Numbers are padded with zeros (01, 02… or 001 for 100 files or more) so they sort correctly.
- **Find:** Only shown for Find & replace. The text to look for in each name, such as IMG_. It's case-sensitive.
- **Replace with:** Only shown for Find & replace. What to put instead. Leave it empty to remove the found text.
- **Text:** Only shown for Add prefix and Add suffix. The text to add at the start or end of each name, such as “2026 - ”. A suffix goes before the extension.
- **Case:** Only shown for Change case. lowercase, UPPERCASE or Title Case, which capitalises the first letter of each word.

## Tips
- For numbering, sort the list first: drag files into order, because they're numbered from top to bottom.
- Include spaces or separators in prefixes and suffixes yourself, such as “Project X - ”. Nothing is added automatically.
- Find & replace is case-sensitive, so “IMG_” won't match “img_”. Run it twice if your files use both.
- Renaming makes copies, so check you have the disk space when renaming a big batch of videos.
- Want names based on what's in each file? Smart Rename reads the contents and suggests descriptive names.

## Questions
**How do I rename multiple files at once on a Mac?**
Drop them onto Batch Rename, choose Numbering, Find & replace, a prefix or suffix, or a case change, and click Rename. Renamed copies are saved in your OneMacTools folder.

**How do I number files in order?**
Choose Numbering, type a name and a starting number, and drag the files into order in the list. You get names like Trip 01, Trip 02, Trip 03.

**How do I remove IMG_ from photo names?**
Choose Find & replace, type IMG_ in Find and leave Replace with empty. IMG_1234 becomes 1234.

**Does it change the file extension?**
No. Only the name before the extension changes, so a .jpg stays a .jpg and opens in the same app.

**Why are my files copied instead of renamed?**
Batch Rename never touches your originals. It makes renamed copies, so if a rename goes wrong you still have the files as they were.

**Can I rename folders as well?**
Yes. Drop folders in with or instead of files. Each folder is copied with its contents and given the new name.