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RenameRegex

Free#25 of 31 in File Renaming Software

RenameRegex: A focused, free Windows utility for batch renaming with regex control and previews. Ranked #25 of 31 in File Renaming Software by our editors (5.7/10); pricing: Free plan; best for free Windows regex renaming.

5.7/10★★★☆☆Editor score

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At a glance

• Editor score
  5.7 / 10
• Pricing
  Free plan
• Best for
  Free Windows regex renaming
• Free plan
  Yes
• Paid from
  Free
• Regex renaming
  Yes
• Facts checked
  22 Sep 2026

• Where it wins

  • Batch-renames files and directories with regular expressions
  • Preview mode shows proposed changes before execution
  • Recursive processing preserves file extensions and supports case-insensitive matching

• Where it doesn't

  • Windows-only platform coverage
  • Command-line workflow suits technically comfortable users
  • Focused on renaming rather than undo or metadata workflows

Our verdict on RenameRegex

RenameRegex is an open-source Windows command-line utility for renaming files, directories, or both in batches. It is designed for users who need repeatable naming rules rather than one-off edits, with support for simple substitutions, .NET regular expressions, file-match patterns, and recursive processing. Case-insensitive matching and file-extension preservation add control for larger folder structures, while optional overwrite handling gives users a choice when destination names already exist.

The product is free to use and distributed under the MIT license, with no paid tiers separating core capabilities. Its published feature set includes file and directory batch renaming, regular-expression search and replacement, preview mode, recursive processing, case-insensitive matching, extension preservation, and overwrite control. That makes the value proposition straightforward: users get the full listed toolset without a commercial plan structure. The latest listed release is v1.7.0 from February 2022, which is relevant for buyers assessing how the project fits into a longer-term workflow.

Setup and daily use center on the Windows command line, so RenameRegex is a better fit for users comfortable specifying paths, patterns, substitutions, and processing options than for people seeking a graphical renaming interface. Preview mode provides a review step before changes are applied, and recursive processing helps extend a rule through nested directories. The tool should appeal to Windows users who want free, scriptable regex renaming with directory support. Those who need broader platform coverage, visual workflow design, undo-oriented recovery, or metadata-focused operations should choose a different type of renaming tool.

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RenameRegex pricing

RenameRegex fact sheet

Alternatives to RenameRegex

• KRenameA capable free Linux renamer for expressions, metadata, folders, and undo.9.0
• Bulk Rename UtilityA feature-rich Windows renamer for precise batch operations, scripting, and metadata rules.8.9
• Name ManglerA focused Mac renamer with advanced rules, previews, reversal, and Dropbox or Box support.8.4

See all RenameRegex alternatives →

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Featured on iTechGuides

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update