Batch File Renamer

Batch File Renamer is a free Windows utility for renaming thousands of files in one pass.
Chain up to five rule steps (add content, find & replace, change case, remove characters, rebuild the whole name) into one repeatable pipeline. Every change shows up in the live preview table as you type, with name-conflict warnings, invalid-name checks and character-level diff highlighting before anything touches the disk.
Renames run in two phases through unique temporary names, so swaps and multi-file chains work, and an existing file is never overwritten. One click rolls back the last batch. The last 20 batches are kept in a history that survives app restarts.
Large folders are handled with a streaming scan: files appear in the list while scanning, up to 50,000 entries per pass. Paths beyond 260 characters are supported through the \\?\ mechanism. A filter narrows the list by name, checkboxes pick exactly which files take part, and numbering stays continuous with no gaps. The full original-to-new-name mapping can be exported as CSV for review or archive.
Presets apply ready-made rule combinations in one click, then each step can be fine-tuned. The interface ships in English, Chinese, German, Japanese, French, Spanish and Portuguese, with dark and light themes.
Everything runs locally. No servers, no tracking, no cloud uploads. File names never leave the device, and the tool works fully offline after download.
Freeware, version 2.0.0.0 (2026-09-22). Size 2.84 MB. Windows 7, 10 and 11. Requires the Microsoft Edge WebView2 Runtime.