SMALL TOOLBOX · Bulk File Renamer
Bulk File Renamer
Apply consistent prefixes, suffixes, substitutions and serial numbers to many files.
Inputs and settings
Results and preview
Enter the details and run the tool.
Instructions and important notes
Original files are not renamed in place. Operating-system filename constraints may vary.
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Who should use this tool?
Apply consistent prefixes, suffixes, substitutions and serial numbers to many files.
Before you begin
Select files, specify naming rules, preview each change and check for collisions before exporting.
Step-by-step instructions
- Prepare the supported inputs described above. Keep original files as a backup.
- Use the tool controls to process the information. Review any on-screen warnings before proceeding.
- Inspect the generated output against your input before downloading or printing.
What will you receive?
A ZIP archive containing files with their new filenames.
Limitations and incorrect-result cases
Original files are not renamed in place. Operating-system filename constraints may vary.
Questions about your data
Are my files sent to a server?
File-processing calculations run in this browser. Hosting, fonts, analytics scripts and optional third-party libraries may still make network requests. Read our privacy policy for details.
Should I trust the output without checking?
No. Compare important results with the original and use a professional check where legally or technically required.