File Renamer
Rename multiple files at once with advanced patterns. Supports sequential numbering, find/replace, case conversion, and more. All processing happens locally in your browser.
đ Drop files here to rename
or
Supports all file types. Files are processed locally.
Note: Metadata extraction requires additional processing and may not work for all file types. For advanced metadata renaming, consider dedicated metadata tools.
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đĄ Renaming Tips
- Preview first: Always check the preview before applying changes
- Use counters: Sequential numbering is great for organizing photos and documents
- Remove spaces: Use underscores or dashes for better web compatibility
- Case consistency: Stick to one case style (lowercase recommended)
- Test with copies: Work on file copies until you're confident with the pattern
About File Renamer
File Renamer is a powerful tool for batch renaming multiple files at once. It supports various renaming patterns including sequential numbering, find and replace, case conversion, and custom patterns with tokens. All processing happens locally in your browser, ensuring your files remain private and secure.
Key Features
- Multiple Renaming Methods: Sequential numbering, find/replace, prefix/suffix, date/time stamps
- Case Conversion: Convert filenames to lowercase, UPPERCASE, Title Case, camelCase, snake_case, and kebab-case
- Advanced Patterns: Custom patterns with tokens for counter, date, time, random strings
- Text Transformations: Remove accents, special characters, truncate long names
- File Sorting: Sort files by name, size, date, or type before renaming
- Undo/Redo: Multiple levels of undo and redo for safe experimentation
- Preview & Edit: Preview changes before applying, with manual editing option
- No File Limits: Process as many files as your browser can handle
- Privacy Guaranteed: All processing happens locally - no file upload to servers
Common Use Cases
đ¸ Photo Organization
Rename vacation photos with dates and sequential numbers: "2023-12-25_001.jpg", "2023-12-25_002.jpg"
đ Document Management
Standardize document names: "Invoice_202312_vendor.pdf", "Contract_202401_client.docx"
đĩ Media Files
Rename music files: "Artist - Song Title.mp3", "Album - Track Number.mp3"
đž Web Development
Convert filenames to web-friendly format: "my-image-file.jpg" â "my-image-file.jpg"
Pattern Examples
| Original | Pattern | Result |
|---|---|---|
| IMG_1234.jpg | [prefix][counter].[ext] | photo_001.jpg |
| my document.txt | Remove spaces + Title Case | MyDocument.txt |
| file-(1).pdf | Find "(" replace with "_" | file_1).pdf |
| image.png | Add date prefix | 20231231_image.png |
Safety Tips
- Always preview: Use the preview tab to see changes before applying them
- Work with copies: Test renaming patterns on file copies first
- Use undo feature: The undo button can revert changes if you make a mistake
- Check extensions: Be careful when changing file extensions - it can make files unopenable
- Backup important files: Keep backups of critical files before batch renaming
Technical Details
File Renamer uses HTML5 File API and JavaScript to process files entirely in your browser. No files are uploaded to any server. The tool can handle hundreds of files simultaneously, limited only by your browser's memory capacity. For very large batches, consider processing in smaller groups.
Related System Tools
Check out our other system utilities: Duplicate File Finder, Disk Space Analyzer, System Info Checker.