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Add sequential numbers to a group of files

The Numbering panel creates an ordered sequence for selected files, optionally with leading zeros.

Windows 11 & Windows 10 · Numbering · Updated November 2, 2026

Quick answer: The Numbering panel creates an ordered sequence for selected files, optionally with leading zeros.

Bulk Rename Utility lets you set rules separately, select the exact items to be affected, and preview the results in a New Name column. The workflow below focuses on bulk rename sequential numbers without changing unrelated files.

Example: before and after

These filenames are examples to explain the transformation; they are not test results from your files.

BeforeAfter (illustrative)
event.jpgevent_001.jpg

How to do it step by step

  1. Step 1. Sort files into intended order.
  2. Step 2. Select the group.
  3. Step 3. Set a start number and padding.
  4. Step 4. Check the New Name column for sequence gaps.

Why this workflow works

The rule and selection work together: the rule changes eligible filenames, while the selection limits which files receive the change. Always inspect the New Name column and confirm the directory before choosing Rename. For repetitive work, save verified settings as a favourite, but review them again on each new batch.

Important limitation: Numbering follows the selected sort/order; verify order before applying. A filename preview does not guarantee the underlying file is backed up; keep a separate copy before bulk changes.

How to verify the results

Compare the original and proposed filenames side by side, check that each target name is unique in its directory, and confirm file extensions match the actual file types. After applying the rule, open a sample file in its usual Windows application and check any shortcuts or scripts that use the old path.

Frequently asked questions

How do I sequential numbers in Bulk Rename Utility?

The Numbering panel creates an ordered sequence for selected files, optionally with leading zeros.

What should I check before applying this batch?

Compare the New Name preview for every selected file, check for duplicates and verify extensions. Numbering follows the selected sort/order; verify order before applying.

Does changing a filename also change its contents?

No. A standard filename rename changes the name or path, not the document, photo, audio, or video data. Changing an extension also does not convert a file format.

Related Windows renaming guides


For release details, licensing and implementation-specific controls, consult the documentation and source list. Always use a small test directory before a large batch.