Batch Converting DNGs to JPEGs

DNG Reader Bill Baum writes in asking if it’s possible to batch convert DNG files to JPEGs. Bill says that several years ago, he converted several thousand images to DNG, but now wants them as JPEGs to ease the process of working with them in Nikon Capture NX, which doesn’t natively read DNG files. Fortunately, if you have Photoshop CS2 or CS3, you can easily use Bridge to batch process DNG conversions into JPEGs, Photoshop files, or TIFFs.

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Convert Raw to DNG Automator Action

UPDATE SEPTEMBER 2017: This action no longer works and the links to it have been removed. You can batch-convert raw files to DNG with Adobe’s DNG Converter (currently at version 9.12.1), or when importing images into Lightroom, if that is your primary image editor.

We still publish a set of Photoshop Automator Actions, which has been updated for Photoshop CC 2017. You can find out more at our sister site, RobotPhotoshop.com.


Adobe’s Digital Negative Specification, or DNG format, provides an open standard for the storage of raw camera data. However, since few cameras can store directly into Digital Negative format, if you want to take advantage of DNG, you first need to convert your existing raw files to DNG format using the Adobe DNG Converter. Mac users running OS X 10.4 (“Tiger”) or later can ease their conversion tasks using this Automator action, which lets you batch process your DNG conversions, as well as include DNG conversion in a more complex image processing pipeline. This updated version adds Leopard support as well as the ability to convert Sony SR2 files.

For photographers who shoot raw, DNG offers several important advantages over proprietary formats: it’s open source, so any software or hardware vendor can support it; it won’t vanish if any particular company goes out of business; and it includes support for all raw conversion metadata, making for a more efficient, all-in-one, raw format/metadata file.

Automator, meanwhile, is an excellent workflow automation tool which allows you to create applets that automatically manage your post-production pipeline. Read more »