Batch File Rename
Online, in seconds.
Rename dozens or hundreds of files at once with sequential numbering, find & replace, case rules and more — all processed locally in your browser. Nothing is ever uploaded.
Batch File Renamer
Add files, choose your rules, preview instantly, then export.
Drop files here or click to browse
Any file type · Processed entirely in your browserPreview & Export
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Everything you need to rename files in bulk
Find & Replace
Swap text or use full regular expressions to match complex patterns across every filename at once.
Sequential Numbering
Add ordered numbers with custom start value, digit padding, and placement before, after, or replacing the name.
Prefix & Suffix
Prepend project codes, dates, or tags, and append version markers or descriptors in one pass.
Case Conversion
Normalize filenames to lowercase, UPPERCASE, Title Case, or camelCase for consistent naming conventions.
Live Validation
Invalid characters, empty names, and duplicate results are flagged instantly before you export anything.
ZIP Export
Download every renamed file bundled into a single ZIP archive, or copy the new filenames to your clipboard.
How It Works
Add your files
Drag and drop or browse to select any files from your device. Nothing uploads to a server.
Set your rules
Combine find & replace, numbering, prefixes, suffixes, case rules, and extension changes.
Preview instantly
Every new filename updates live in the results table so you can catch mistakes before exporting.
Export your files
Download a ZIP with all renamed files, or copy the new filenames for use elsewhere.
What Is Batch File Rename and Why Use It?
Batch file rename is the process of renaming many files at the same time using a consistent rule instead of typing each new name by hand. Anyone who has scrolled through a folder full of files labeled IMG_0001, IMG_0002, and IMG_0003 already understands the problem this bulk rename utility solves. A file renamer applies one pattern, such as sequential numbering, a prefix, or a find and replace rule, across an entire batch of files in seconds rather than minutes or hours of manual editing. This file rename utility is especially useful for photographers organizing shoot folders, developers cleaning up asset libraries, students sorting coursework, and small businesses standardizing invoice or product image names before upload to an online store or CMS.
Using this tool is straightforward: add your files by dragging them into the drop zone or browsing your device, choose one or more renaming rules such as case conversion, sequential numbering, or a custom prefix and suffix, and watch the preview table update in real time. For example, a folder of vacation photos named DSC001.jpg through DSC150.jpg can be transformed into Iceland-Trip-001.jpg through Iceland-Trip-150.jpg with a single prefix and numbering rule, no third-party software installation required. Because every operation runs client-side in the browser using JavaScript, files are never transmitted to a remote server, which makes this approach considerably more private than many bulk rename utility programs that require installation or cloud processing.
Common use cases for a batch renaming workflow include preparing product photography for an e-commerce catalog, standardizing filenames before a bulk upload, cleaning up inconsistent naming from multiple contributors on a shared drive, and applying SEO-friendly filenames such as replacing spaces with hyphens before publishing images on the web. Whether the goal is simple sequential numbering, a full regular expression find and replace, or a combination of prefix, suffix, and case formatting, a dedicated file rename utility saves meaningful time compared to renaming files one by one through a file manager, and reduces the risk of typos that can break links, scripts, or automated import pipelines relying on predictable filenames.
Frequently Asked Questions
Is this batch file rename tool free?
Yes. The tool is completely free with no signup, no watermark, and no artificial file limit beyond what your browser's memory allows.
Are my files uploaded to a server?
No. Renaming happens entirely inside your browser using JavaScript. Your files never leave your device.
Can I undo a rename pattern before downloading?
Yes. The preview table updates live as you adjust settings, so you can review every new filename before you export anything.
What renaming options are available?
Find and replace (including regex), add prefix or suffix, sequential numbering with custom padding and start value, case conversion, extension replacement, and whitespace cleanup, all combinable in one pass.
How do I download the renamed files?
Click Download ZIP to get every renamed file bundled into one archive, or use Copy New Names to copy the new filenames to your clipboard.
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