Help › Rename › Auto Numbering

Auto Numbering

Auto Numbering renames your selected files with sequential numbers. Each file receives a new numeric name based on a starting number you choose, making it simple to organize files into a clean, ordered sequence.

How It Works

  1. Select the files you want to rename in Windows Explorer.
  2. Right-click and choose FilerFrog → Rename → Auto Numbering.
  3. Enter the starting number for the sequence.
  4. Click OK to rename the files.

Each file is renamed to its sequence number while keeping its original extension. The files are numbered in the order they appear in your selection.

Example: You select three files — Report.docx, Notes.docx, and Summary.docx — and set the starting number to 1. They become 1.docx, 2.docx, and 3.docx.

Auto Numbering with Append

This variant combines sequential numbering with a prefix and/or suffix. Instead of replacing the entire filename with just a number, you can add custom text before or after the number.

  1. Select files and choose FilerFrog → Rename → Auto Numbering with Append.
  2. Enter the starting number.
  3. Optionally enter a prefix (text placed before the number) and/or a suffix (text placed after the number).
  4. Click OK to apply.
Example: You have a file named DC00021.jpeg. With the prefix set to Paris and starting number 1, the file is renamed to Paris1.jpeg. The next file becomes Paris2.jpeg, and so on.
Scenario

You return from a trip with hundreds of photos named with cryptic camera codes like DC00021.jpeg, DC00022.jpeg, etc. Select them all, use Auto Numbering with Append, set the prefix to Paris and start from 1. Your photos are now neatly named Paris1.jpeg, Paris2.jpeg, Paris3.jpeg, and so on.

Tip: If you need to number files starting from a value other than 1 (for example, to continue a sequence from a previous batch), simply set the starting number accordingly.

Zero Padding

Numbers are automatically zero-padded based on the total file count. This ensures files sort correctly in Explorer:

Example: Renaming 150 files starting from 1 produces: 001, 002, 003... 150 (3-digit padding). Renaming 15 files produces: 01, 02... 15 (2-digit padding).

Step Value

Set the Step value to skip numbers between files. The default step is 1 (sequential).

Example: Start at 10, Step 5 → 10, 15, 20, 25, 30...