Introduction
You just wrapped a multi-day event where three different photographers shot with Canon, Nikon, and Sony cameras. Now you have a folder with CR2, NEF, and ARW files mixed together, all at different resolutions, and you need to deliver a unified set of JPGs to the client by tomorrow. Mixed RAW formats are a common headache for event coordinators, photo editors, and anyone working with multiple shooters. The good news is you can batch resize and convert all those RAW files to JPG in a single pass, no matter which camera shot them. In this guide we cover why mixed RAW formats are tricky, three ways to handle them, and the fastest batch workflow.
Why This Happens
Every camera maker uses a proprietary RAW format. Canon uses CR2 and CR3, Nikon uses NEF, Sony uses ARW, Fujifilm uses RAF, Olympus uses ORF, and Panasonic uses RW2. Each format wraps the camera's raw sensor data in a unique container with its own metadata structure. To convert any of them to JPG, software needs a demosaicing algorithm specific to that camera maker's color filter array and color profile. Most image editors and operating systems only support a subset of these formats, which is why a folder of mixed RAW files often shows up as a bunch of blank icons. The other challenge is resolution. Different cameras shoot at different megapixels, so a Canon 5D Mark IV file is 30 megapixels while a Sony A7 III file is 24 megapixels. If you want a unified set of JPGs for web delivery, you need to resize them all to the same dimensions during conversion.
3 Solutions
Solution 1: Use a browser-based batch RAW converter for instant unified output. The piczen RAW to JPG converter handles CR2, NEF, ARW, RAF, ORF, and RW2 in one batch, so you can drop in a mixed folder and get a single zip of uniformly sized JPGs. This is the fastest path for most users, since it works on any operating system, requires no software install, and applies the same demosaicing and resize settings to every file regardless of which camera shot it. The tradeoff is that browser tools have file size limits, usually a few hundred megabytes per batch, so very large event folders with 1,000 or more RAW files may need to be split into smaller batches of 200 to 300 images each.
Solution 2: Use Lightroom with a unified catalog for polished deliveries. Import all your RAW files into one Lightroom catalog, apply a develop preset to normalize color and contrast across the different camera profiles, then export as JPG with a resize to 2048 pixels wide. Lightroom is the gold standard for mixed-format event work because it applies camera-specific color profiles, lens corrections, and consistent color grading across Canon, Nikon, Sony, and Fujifilm files in the same catalog. The tradeoff is the subscription cost, the import time for large folders, and the learning curve for building reliable presets. For client galleries where color consistency matters, Lightroom is worth the investment.
Solution 3: Use ImageMagick or RawTherapee locally for scripted workflows. Both are free, open-source desktop tools that handle multiple RAW formats. ImageMagick is command-line driven and perfect for scripted batch conversions with resize, rename, and format conversion in a single command. RawTherapee offers a graphical interface with advanced demosaicing and color controls. The tradeoff is a steeper learning curve, especially for ImageMagick's command syntax, and the need to install raw codec packs on some systems. For power users who convert images daily, these tools are the most flexible and fastest option for very large batches.
Step-by-Step Guide
For the fastest mixed-format conversion, open the raw to jpg converter in your browser. Drag all your RAW files from the mixed folder onto the page, the tool accepts CR2, NEF, ARW, and other formats in the same batch without any preprocessing. Set the output format to JPG and the quality to high, usually 90, which preserves enough detail for client previews while keeping file sizes reasonable for web delivery. If the tool offers a resize option, set it to 2048 pixels wide, which is a good standard size for web delivery, client previews, and online galleries, since most platforms downsize larger images anyway and the smaller files load faster. Click Convert and let it process, a batch of 300 mixed RAW files usually takes 5 to 10 minutes depending on your upload speed and the server load. When it finishes, download the zip, extract it, and you have a folder of uniformly sized JPGs ready to deliver to the client via Google Drive, Dropbox, or a gallery platform like Pixieset. Spot-check a few images from each camera to confirm the color looks acceptable, since different cameras have different default color profiles. For the final edited gallery, process the RAW files in Lightroom where you can apply consistent color grading, lens corrections, and camera profiles across all the different camera makes, then export the final JPGs at full resolution for print or high-quality delivery.
Pros and Cons
Batch converting mixed RAW formats to JPG solves the compatibility problem instantly and lets you deliver a unified set of previews to clients within hours of the event. JPGs open on every device, can be emailed or uploaded to any platform without format errors, and meet every web platform's format requirements, which is invaluable when a client needs same-day sneak peeks. Resizing during conversion ensures all the files are uniform dimensions, regardless of which camera shot them, so the gallery looks consistent rather than a mix of 30-megapixel and 24-megapixel images. The tradeoff is the loss of RAW editing latitude, since JPG is 8-bit and lossy compared to the 12-bit or 14-bit RAW original. Once you convert, you lose the ability to fully recover blown highlights, push underexposed shadows, or tweak white balance without quality loss. The smart workflow is to keep your RAW files archived as digital negatives on an external drive or cloud backup, generate uniformly sized JPG copies for delivery and previews, and only do final editing on the RAW files when the client places an order or selects their favorites. That way you get fast, compatible previews today and full editing flexibility for the final gallery tomorrow, without having to re-shoot or re-convert anything.