How to Use the Regex File Renamer
1. Upload your files (drag & drop or click).
2. Enter your regex pattern in “Find” and the replacement in “Replace”.
3. Watch the live preview table update instantly.
4. Fix any highlighted conflicts.
5. Click Download ZIP when ready.
Quick Tips
• Use # in prefix or suffix for automatic numbering (001, 002…)
• Leave “Find” empty to apply prefix/suffix/case change to all files
• Red rows mean naming conflicts — adjust your pattern to avoid them
Frequently Asked Questions
The tool uses JavaScript’s native RegExp engine with full ECMAScript support including capture groups ($1, $2), character classes, quantifiers, and anchors.
It is replaced with a zero-padded counter: 001, 002, 003… Useful for sequential numbering.
No. The tool creates renamed copies in a ZIP archive. Your original files stay untouched.
Duplicate new names are highlighted in red. Adjust your pattern (add # or more specific regex) before downloading.
Yes. Leave the Find field empty and use only prefix, suffix, or case transform options.