Build renaming rules, preview every result, then rename or download — all without a single file leaving your device.
| Status | Original name | New name | Extension | Size | Folder | Notes |
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Choose files or a folder, build one or more renaming rules, and watch the preview table update instantly. When you're happy with the results, rename the original files directly (if your browser supports it) or download the renamed copies.
Your files are processed locally in your browser and are not uploaded to our servers. Presets are saved only in your browser's local storage. No analytics collect filenames, paths, or rules.
Direct folder renaming uses the File System Access API, available in current Chromium-based browsers (Chrome, Edge, Opera, Brave). Other browsers, including Firefox and Safari, automatically use the rename-and-download mode instead.
Folders themselves aren't renamed in this first release, only the files inside them. Undo is available for the current browser session only and can fail if files change outside the app. Very large ZIP downloads depend on your device's available memory.
No. Renaming and previewing happen entirely in your browser using local file APIs. Nothing about your files is sent to a server.
The preview marks them as duplicates and the rename button stays disabled until you resolve it — either by adding automatic numbering, skipping the conflicting files, or adjusting your rules.
Yes, for direct folder renaming, an "Undo last rename" button appears after the operation completes and works for the rest of your browser session. It can't undo changes made outside the app.
The rename-and-download mode works on mobile browsers. Direct folder renaming needs the File System Access API, which is currently limited to desktop Chromium browsers.