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Bulk File Renamer

Rename multiple files at once with custom rules: prefix, suffix, numbering, and find-replace. 100% local.

[ Select Files to Rename ]

Bulk File Renamer: The Fastest Batch Rename Tool (100% Private & No Upload)

Are you tired of manually renaming hundreds of files? Whether you’re a photographer, a developer, or an e-commerce seller, managing messy filenames is a productivity drain. Our Bulk File Renamer is a high-performance, browser-based utility that lets you rename multiple files at once with zero installation and absolute privacy.

Privacy Warning: Unlike other “online” tools, we never upload your files to a server. Everything happens locally in your browser, making it the most secure batch file renamer online for sensitive documents.

Why This is the Best Online Bulk Rename Tool

When searching for a mass file renamer, most users are forced to choose between clunky desktop software or insecure cloud uploaders. Our tool combines the best of both worlds:

  • Zero Uploads (Client-Side): Uses modern JavaScript (Vite/Svelte) to process files on your machine. Your data never leaves your device.
  • Universal Compatibility: Works as a bulk file renamer for Windows, Mac, and Linux through any modern browser (Chrome, Edge, Safari).
  • Instant Speed: Rename 500+ files in milliseconds. No waiting for upload/download bars.
  • No Admin Rights Needed: Perfect for office workers who can’t install software like “Bulk Rename Utility” or “PowerRename”.

Powerful Features for Every Workflow

1. Batch Add Prefix & Suffix

Quickly prepending or appending text is the most common task in file organization.

  • Prefix: Add dates (e.g., 2026-01-10_) to organize project files chronologically.
  • Suffix: Add status tags like _final, _draft, or _v1 before the file extension.
  • Use Case: Ideal for bulk renaming images for SEO or social media.

2. Sequential Numbering (Auto-Indexing)

Messy camera names like DCIM_1234.jpg are useless. Our sequential numbering tool helps you create an ordered digital library.

  • Set a custom starting number (e.g., 001, 1000).
  • Automatic padding (01 vs 001) for perfect sorting in Windows Explorer or Mac Finder.

3. Smart Filename Cleaning

Stop errors when moving files between systems. Our tool helps you rename files in bulk while ensuring they are web-friendly.

  • Remove spaces and replace them with hyphens (-) or underscores (_).
  • Live preview ensures you see the result before clicking download.

Specialized Use Cases: Who is this for?

  • Photographers: Convert cryptic RAW file names into human-readable titles (e.g., NYC-Trip-001.jpg).
  • E-commerce Sellers: Batch rename product photos for Shopify, WooCommerce, or Amazon to include SEO keywords.
  • Software Developers: Quickly organize assets, icons, and documentation files.
  • Office Professionals: Standardize invoices, reports, and legal PDFs for better archiving.

How to Rename Files in Bulk Without Software (3 Steps)

  • Drop Files: Drag your files directly into the browser window.
  • Apply Rules: Choose to add prefix, suffix, or sequential numbers.
  • Instant Download: Preview the changes and click “Apply & Download ZIP”.

Note: Your original files remain safe and unchanged on your device. The tool creates renamed copies for you.

Frequently Asked Questions (FAQ)

What is the best free bulk file renamer for Mac?

While macOS has a built-in rename feature in Finder, our tool provides a much more intuitive interface with live preview and ZIP packaging, making it a top choice for Mac users who want more control without installing apps.

Can I rename files online without uploading?

Yes! This tool is a client-side renamer. It uses your browser’s local processing power. Your privacy is guaranteed because your files are never sent to a server.

Does it support all file types?

Absolutely. You can bulk rename PDF, JPG, PNG, MP4, DOCX, XLSX, and any other file extension. The tool preserves the file integrity while only changing the name.

Is there a file limit?

The only limit is your computer’s RAM. Most modern browsers can easily handle 500-1000 files in a single batch.

Start Organizing Your Files Today

Don’t let a “File_Final_v2_UPDATED_Final” situation ruin your productivity. Use our Bulk File Renamer to regain control over your digital workspace.

Bookmark this tool for the next time you need a fast, secure, and free way to batch rename files online.