Naming conventions and output structure for batch exports

The Bulk Image Processor gives you two naming modes: keep the source filenames, or apply a common prefix. This article covers how each mode works and when to use which.

Default: retain source filenames

If you leave the common file name field empty, every file in the batch keeps its original name (minus the extension, which is replaced by the output format). So event-001.heic becomes event-001.jpg or event-001.webp depending on your export format. This is the default and usually what you want for photography workflows where original filenames carry information.

Using a common file name prefix

Enter a value in the common file name field to apply a single prefix to every file in the batch. Dropmatico appends a numeric suffix to keep filenames unique. So a prefix of launch-hero across 16 files produces launch-hero-01.jpg through launch-hero-16.jpg. Useful for campaign handoffs where consistent, scannable naming matters more than source attribution.

Per-file naming override

If you need custom names for individual files in the batch, click the filename next to any thumbnail in the review grid and type a replacement. The override wins over both source names and the common prefix. Use this sparingly for hero shots inside an otherwise uniform batch.

How numbers and suffixes are appended

When you use a common prefix, Dropmatico zero-pads the numeric suffix based on batch size. A 16-image batch uses two-digit padding (01 through 16). A 9-image batch uses one-digit padding. This keeps filenames alphanumerically sortable in Finder, Explorer, and upload dialogs.

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