About File Rename
File Rename is a high-performance web utility built to rename multiple files in batch. Apply prefixes, suffixes, search-replace rules, change casing, and download modified files client-side instantly and securely. Because it is designed with a local-first architecture, all processing occurs directly in your browser's memory using client-side JavaScript. This ensures that your files, code, or private text inputs are never uploaded to any external server or tracked by third-party analytics.
Whether you are formatting source code, cleaning text files, converting file structures, or running diagnostics, running these processes locally in your browser memory sandbox eliminates network latency and protects your data privacy.
Frequently Asked Questions (FAQs)
How do I batch rename files?
Upload files, define renaming rules (like add prefix or change extension casing), and download the renamed files.
Do my files upload to a server?
No. The renaming occurs in the browser sandbox. Your actual file data remains secure on your disk.
Which renaming rules can I apply?
You can insert sequential numbers, append custom headers/footers, find and replace strings, or change letter cases.
Is there a limit on file numbers?
Since renaming is processed client-side, the batch size is limited only by your computer's system speed.
Explore Other Text & Writing Utilities
Here are other highly useful tools in our suite that you might find helpful:
- Word Counter - Efficiently run word counter calculations directly in your browser.
- Character Counter - Efficiently run character counter calculations directly in your browser.
- Case Converter - Efficiently run case converter calculations directly in your browser.
- Remove Extra Spaces - Efficiently run remove extra spaces calculations directly in your browser.