Upload Files to Rename
Drag & drop multiple files or folders here to begin.
Supports all file types. Rename up to thousands of files instantly.
Supports all file types. Rename up to thousands of files instantly.
How to use the Bulk File Renamer
Drag and drop the files you want to rename, or click to select them. They stay in your browser — nothing is uploaded to any server.
Add renaming rules from the 'Add Rule' menu: Find & Replace, Prefix, Suffix, or Numbering to batch rename files your way.
Configure each rule and stack multiple rules together — they're applied in order, so you can rename multiple files at once with complex patterns.
Check the preview table to see every new filename before committing. File extensions are kept intact automatically.
Click 'Download ZIP' to save all renamed files to your computer instantly.
Why use this tool?
Private and secure
Rename files locally in your browser. Your files stay on your device and are never uploaded to a server — no one sees them but you.
Bulk rename in one go
Rename hundreds of files at once with stackable rules: prefix, suffix, find & replace, and sequential numbering.
Instant, no waiting
No upload means no waiting for transfers. Renaming happens instantly on your device, even with large video or image files.
Free, no sign-up
Completely free file renamer with no account, no installation, and no limits. Open the page and start renaming.
Frequently Asked Questions
No. All renaming happens locally in your browser — your files never leave your device. That makes it a truly private file renamer with no server, no storage, and no tracking of your file contents.
Yes, it's completely free with no sign-up, no registration, and no hidden limits. You can batch rename as many files as you want, as often as you want.
Drop your files into the tool, add one or more renaming rules — prefix, suffix, find & replace, or numbering — then check the preview and download everything as a ZIP. Hundreds of files can be renamed in one go.
Yes. This tool runs entirely in your web browser, so there's nothing to download or install. It works as a full replacement for desktop batch rename utilities on any operating system.
No. Your files are never converted or modified — only the filename changes, and the original extension is kept automatically. A renamed MP4 is still the exact same MP4, byte for byte.
No, and that's intentional. The extension is locked to prevent broken files — renaming '.mp4' to '.mp3' wouldn't convert anything, just create a file that won't open properly. If you need a different format, use a real converter tool instead.
Yes. Use the Prefix or Suffix rule to add text to every filename, or Find & Replace with an empty replacement to strip unwanted text — like removing 'Copy of' or camera prefixes from hundreds of files at once.
Yes. You can bulk rename JPG, PNG, WebP, HEIC, and any other image format. It's handy for organizing photo dumps — for example, numbering an entire camera roll in sequence.
Yes, and because nothing is uploaded, even multi-gigabyte MP4, MOV, or MKV files rename instantly. There's no waiting for a huge video to transfer to a server and back.
Yes. PDF, DOCX, XLSX, and other documents can all be renamed in bulk. The content, formatting, and metadata inside the document stay untouched — only the filename changes.
Yes. Bulk rename MP3, WAV, FLAC, or any audio format — useful for cleaning up music libraries or numbering podcast episodes. Note that this changes filenames, not ID3 tags.
Use lowercase descriptive words separated by hyphens, like 'blue-running-shoes.jpg' instead of 'IMG_4032.jpg'. With Find & Replace you can swap spaces and underscores for hyphens across all your image files before uploading them to your site.
Yes. Since it runs in the browser, it works on any device with a modern browser — Windows, macOS, Linux, ChromeOS, Android, and iOS. No app needed.