Add Prefix to Filenames

Prepend a custom prefix string to the beginning of multiple filenames in bulk.

How It Works & Processing Standards

Prepend a custom prefix string to the beginning of multiple filenames in bulk.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Desktop max file size: 100MB
  • Mobile max file size: 40MB

Add Prefix to Filenames is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use Add Prefix to Filenames

  1. 1
    Upload FilesSelect files to rename.
  2. 2
    Set PrefixType custom prefix (e.g. "v2_").
  3. 3
    Download FilesSave renamed files in a ZIP package.

Common Use Cases

  • Adding client names or version codes to the beginning of all deliverables
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