Is my file data safe?

Yes, this tool processes everything locally in your browser. No files are uploaded to any server, ensuring complete privacy and security of your data.

What rename operations are supported?

Supported operations include: add prefix, add suffix, sequential numbering, find and replace, case conversion (uppercase/lowercase/camelCase/snake_case/kebab-case), and change file extensions.

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Batch File Renamer

Batch add prefix/suffix, numbering, find & replace. Browser-based, no file upload

📁

Drag files here, or click to select files

Only reads filenames, won't upload file content

Or manually enter filenames (one per line)

Add Prefix

Add Suffix (before extension)

Start Number

Step

Padding Digits

Add number to filename start (default: end)

Find

Replace

Case Conversion

Original Extension

New Extension

Replace extension for all files

Files: 0 Modified: 0

Preview Results

Rename Commands (copy to terminal)

What is Batch File Renamer?

Batch File Renamer helps you rename multiple files at once with unified operations like adding prefix/suffix, numbering, find and replace, etc. The tool only generates rename commands, won't actually modify your files - safe and reliable.

Supported Rename Operations

📌 Prefix — Add text before filename, e.g., IMG_
📎 Suffix — Add text before extension, e.g., _backup
🔢 Number — Sequential numbering with padding, e.g., 001, 002
🔄 Replace — Find and replace text in filenames
🔠 Case — lowercase, UPPERCASE, camelCase, snake_case, kebab-case
📄 Extension — Batch change file extensions

Frequently Asked Questions

What is a regex tester?

A regex tester lets you write and test regular expressions against sample text in real-time, highlighting matches as you type.

How to test an API endpoint?

Enter the URL, select HTTP method (GET/POST/PUT/DELETE), add headers and body, then click Send. JieBang's API Tester shows the response instantly.

Are developer tools free?

Yes, all JieBang developer tools are 100% free — JSON formatter, Base64 encoder, regex tester, API tester, cron validator, and more.

Batch File Renamer