Bulk File Renamer

About the Bulk File Renamer

The Bulk File Renamer helps anyone clean up messy folders of files in a single pass. Drop in a batch of documents, photos, or assets, choose a naming pattern, preview the renames side by side with the originals, then download the renamed files as a fresh ZIP.

Everything runs locally in your browser — your filenames and file contents never leave your device — so you can tidy sensitive archives without uploading them anywhere.

What you can control

• Drag-and-drop or file-picker selection of any batch of files
• Naming patterns: prefix, suffix, find-and-replace, sequential numbers
• Case conversion (lowercase, UPPERCASE, Title Case)
• Start number and padding (e.g. 001, 002, 003)
• Drag-to-reorder before applying the rename
• Side-by-side preview of original vs. new filenames before committing
• One-click ZIP download of the renamed batch

Common uses

• Standardizing photo filenames before uploading to a portfolio or gallery
• Normalizing client deliverables before handoff
• Cleaning up scanned receipts, statements, or contracts for an accountant
• Adding episode or chapter numbers to media files

Tips

• Use the preview to catch typos in your pattern before downloading
• Lead numeric prefixes with zero padding (e.g. 001) so files sort naturally
• Reorder files first if you want sequence numbers to follow a specific sort
• Pair this with the File Zipper if you need to bundle additional assets

If you regularly receive files with inconsistent naming (camera dumps, scanned documents), keep a notes file with the rename pattern you use so each batch follows the same convention.