RootUtils

Batch Renamer

Client-Side Secure

Prefix, suffix, find/replace, and auto-number large batches of filenames. Export a CSV map for scripts.

Filenames (one per line)
Processed locally; names never leave your browser.
Preview
Add filenames to see results.
Tips
  • Paste filenames from your file explorer.
  • Use find/replace for quick pattern cleanup.
  • Export a CSV map for scripted renames.

Is this tool broken?

Let us know if you found a bug or have a feature request.

Rename large batches of files with prefixes, suffixes, find/replace, and auto-numbering. Generate a CSV mapping locally so filenames never leave your browser.

  • Paste filenames and preview new names instantly.
  • Export or copy a CSV mapping for scripted renames.
  • Supports custom numbering start, padding, and delimiter.

You might also like

File Inspector

Free online File Inspector. Analyze file headers, MIME types, and metadata securely in your browser. Identify unknown file types without uploading.

URL Slug Generator

Convert text into clean, SEO-friendly URL slugs instantly.

Timezone Converter

Free online Timezone Converter. Convert meeting times between multiple time zones with automatic DST support. Simple, fast, and secure tool for developers.