Renumber Files
Batch Number Incrementing

Add +1 to File Numbers
Starting From Any Position

Need to increment file numbers to make room for new documents? Select your starting point, and we'll add +1 (or more) to every file number from there. No manual renaming required.

Increment Example: Adding +1 from Position 5

Before
01 Document A.pdf
02 Document B.pdf
03 Document C.pdf
04 Document D.pdf
05 Document E.pdf
06 Document F.pdf
07 Document G.pdf
08 Document H.pdf

You want to insert a new file at position #5

After
01 Document A.pdf
02 Document B.pdf
03 Document C.pdf
04 Document D.pdf
05 [SPACE FOR NEW FILE]← Gap for new file
06 Document E.pdf
07 Document F.pdf
08 Document G.pdf
09 Document H.pdf

Files #5+ automatically renumbered

When You Need to Increment File Numbers

  • • You have files numbered 1–50 and need to insert a new file at position 25
  • • Files 25–50 need to become 26–51 to make room
  • • You want to add multiple files and need to shift numbers by more than 1
  • • You're reorganizing a numbered sequence and need to create gaps

Private by Design — Your Filenames Stay With You

Increment numbered filenames from sensitive projects without anything leaving your machine — trusted for legal, medical, and financial work.

Runs 100% in your browser

No data ever leaves your device. All processing is local.

No file uploads

We never see your files — ever. Nothing is sent to any server.

Only file names processed

Not content, not metadata. Just the filename strings you provide.

No account required to try

Try it right now without signing in.

Your data stays on your device. Always.

How to Use It

Simple, guided, and impossibly fast

1

Copy and Paste Your File Names

Copy and paste the names of your numbered filenames (we automate that for you). The tool automatically detects the pattern.

2

Choose Where to Insert

Tell the tool where you want to add new files. As many new positions as you like.

3

Generate & Apply

Preview your changes, then automatically rename your files with a couple of clicks! It's that simple!

Interactive Demo

Try Incrementing Now

Test with up to 10 numbered files. No sign-in required.

Quick Start Guide

Follow these steps to get your file list from PowerShell

  1. 1.In your file explorer, navigate to the folder containing files you want to renumber.
  2. 2.Hold Shift on your keyboard and right-click on the folder containing the files you want to renumber
  3. 3.Select "Open PowerShell window here"
PowerShell menu showing Open PowerShell window here option
  1. 4.Type Get-ChildItem -Nameand press Enter
  2. 5.Select all of the output (click and drag with your mouse) and copy it (Ctrl+C)
  3. 6.Paste the filenames into the text box below

Try the Demo

Test with up to 10 files. Sign in for unlimited access + 3 free runs.

Ready to Increment Your File Numbers?

3 free uses. No credit card required.

Frequently Asked Questions

Incrementing file numbers means adding +1 (or more) to the number in each filename. For example, if you have files 10-50 and need to make room at position 10, incrementing shifts them to 11-51.
Yes! If you need to insert multiple files, just specify how many new documents you're adding. We'll increment all affected files by that amount.
Absolutely. Renumber Files processes everything locally in your browser. We never upload your filenames to any server, never access your actual files, and never store any of your data. It's 100% client-side processing.
Renumber Files works for both Windows and MacOS. The web interface works on any modern browser.
No installation required. Renumber Files is a web application that runs entirely in your browser. You just need PowerShell (built into Windows) to execute the generated rename commands.
You get 3 free uses of the full tool after signing in. The public demo lets you test with up to 10 files without signing in. Pro subscribers get unlimited access for $9.50/year.
Yes, you can cancel your Pro subscription at any time from the billing portal. You'll retain access until the end of your billing period.

Related Use Cases

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