About BulkRenameTool
BulkRenameTool is a free online bulk file renamer built with a simple mission: to provide the fastest, safest, and easiest way to rename multiple files at once — without downloading any software. Whether you need to rename 10 files or 10,000 files, our free bulk rename tool handles it instantly in your browser.
Why We Built This
Most desktop file renaming tools are clunky, require installation, and are restricted to specific operating systems. On the other hand, many "online" tools force you to upload your files to their servers, compromising your privacy and taking forever on slow connections.
We thought there should be a better way. Thanks to modern browser APIs — specifically the Web File API and WebAssembly-compiled JSZip — we built a batch rename tool that processes everything locally in your browser. Your files never leave your device. Not even a single byte is transmitted to any server.
Who Is It For?
BulkRenameTool is used by people from all walks of life who deal with large numbers of files:
- Photographers who need to bulk rename photos from generic camera names like IMG_1234.jpg into descriptive client delivery names.
- Developers who need to bulk rename project files using regex patterns for case conversion or namespace cleanup.
- Office workers who need to standardize hundreds of invoice PDFs or scanned documents with consistent naming conventions.
- Content creators who need to batch rename video clips, audio stems, or graphic assets before publishing or delivering to clients.
100% Privacy Guarantee
When you use BulkRenameTool, your files never leave your device. We do not have servers that process your files, we do not store them, and we certainly do not inspect them. The entire renaming and ZIP packaging process happens within your web browser using JavaScript and the Web File API. You can verify this yourself: load the tool, disconnect from the internet, and it still works perfectly.
Read our full privacy policy for complete technical details.
Free Forever
This bulk file renamer is provided completely free of charge. No accounts, no paywalls, no freemium limits. Rename 1 file or rename 10,000 files — there are no restrictions. Our goal is to make a genuinely useful tool freely accessible to everyone who needs to rename files in bulk.