Will the files in my original folder be renamed in place?

No. Browser file access does not rename the selected originals. The tool prepares new downloads with the previewed names, leaving every source path and file untouched.

How does numbering follow the displayed file order?

Numbers are assigned using the current card order, including manual drag or arrow changes. Auto digits use the highest generated number, so a sequence ending at 18 is padded as 01 through 18.

In what order are the rename rules applied?

Find & Replace runs first, followed by Add before, Add after or Replace name, and then Change Case. The extension is separated before those rules and restored with its original spelling and casing.

What prevents one result from overwriting another?

Output names are checked case-insensitively for duplicates and unsafe names are identified in the preview. Rename Files remains blocked until conflicts or empty stems are corrected.

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Batch File Renamer

Design consistent filenames for a batch and inspect every final name before saving unchanged copies.

Add files to rename

Choose or drop multiple files of any type. Their contents remain unchanged.

Filename previews and downloads are prepared locally. File contents, metadata, quality, and original files remain untouched.

How to use Batch File Renamer

1
Choose or drop files of any type, then set Order to Original, Name A–Z, Name Z–A or arrange a Manual order by dragging cards or using the arrow buttons.
2
Select Add before name, Add after name or Replace name. Replacement can use text or sequential numbers with a Starting number and Auto or Custom digit width.
3
Optionally apply literal Find & Replace, Case sensitive matching and lowercase, UPPERCASE or Title Case. Review every live original-to-final Filename preview.
4
Resolve duplicate or invalid names, click Rename Files, then download individual byte-identical copies or use Download All to select a folder where supported.

Frequently asked questions

About Batch File Renamer

Renaming a collection is less about one clever rule than confidence in every resulting filename. Batch File Renamer keeps the original and proposed names together, recalculating the preview as text, numbering, case or order changes. This makes it suitable for organizing photographs, project exports, document sets and other mixed file batches.

The modes reflect common naming tasks without requiring a template language. Prefixes and suffixes receive a clean hyphen automatically, full replacement can use text or a padded sequence, and Find & Replace runs before the main rename choice. Manual ordering matters because it also controls numbering; A–Z, Z–A and original-order sorting provide faster alternatives.

Extensions are protected from filename case transformations and restored exactly. Unsafe path characters and trailing filesystem hazards are sanitized conservatively, while duplicate output names are blocked before saving. Downloaded copies contain the exact source bytes—no metadata rewrite, conversion or recompression—and folder saving is used only when the browser exposes it.