RAW to JPG — Developing Your Digital Negatives
RAW files aren't images — they're sensor data waiting to be interpreted. Here's what that means, when you should convert to JPG, and when you shouldn't bother.
Let me settle something upfront: there is no single "RAW format." RAW is a category, not a specification. Every camera manufacturer invented their own version, and they're all different.
Canon uses CR2 and CR3. Nikon uses NEF. Sony uses ARW. Fujifilm uses RAF. Olympus/OM System uses ORF. Panasonic uses RW2. Pentax uses PEF. Adobe tried to fix this mess by creating DNG (Digital Negative) as a universal standard in 2004, and while it's gained traction — Google Pixel phones shoot DNG, for instance — most camera makers still ship their proprietary formats.
This matters because it's why RAW files can be annoying to work with. Your computer needs specific decoder support for each format, and new camera models sometimes introduce variations that older software can't read.
What RAW Actually Contains
A JPG from your camera is a finished photograph. The camera's processor took the sensor data and made hundreds of decisions: white balance, contrast curve, noise reduction, sharpening, color saturation, lens correction. Then it compressed the result and discarded the original data.
A RAW file is what existed before all those decisions. It's the raw voltage readings from the image sensor, typically at 12-14 bits per channel instead of JPG's 8 bits. That extra bit depth translates to dramatically more latitude in post-processing.
Practical example: if you underexpose a JPG by two stops and try to brighten it in editing software, you'll get ugly banding, noise, and washed-out colors. Do the same recovery on a RAW file and the image looks like it was properly exposed in the first place. The data was always there — it just needed to be pulled out.
RAW File Sizes Across Cameras
File sizes vary enormously based on sensor resolution and bit depth:
| Camera | Format | Resolution | Typical RAW Size |
|---|---|---|---|
| Canon EOS R5 | CR3 | 45 MP | 25-50 MB |
| Nikon Z9 | NEF | 45.7 MP | 35-65 MB |
| Sony A7R V | ARW | 61 MP | 60-120 MB |
| Fujifilm X-T5 | RAF | 40 MP | 50-70 MB |
| iPhone 15 Pro | DNG | 48 MP | 25-35 MB |
| Google Pixel 8 | DNG | 50 MP | 12-20 MB |
Quick Conversion vs. Proper Development
There's a meaningful distinction here. "Converting" RAW to JPG means applying default processing and exporting — you get a usable image with minimal effort. "Developing" a RAW file means manually adjusting exposure, white balance, tone curves, color grading, lens corrections, and noise reduction before exporting.
If you just need usable JPGs from RAW files — maybe someone sent you a batch and you need to view or share them — quick conversion is fine. The camera's embedded preview (which every RAW file contains) gives you a reasonable starting point.
If you care about getting the best possible image from each file, you want proper development software.
Software for RAW Development
RawTherapee is free, open-source, and handles virtually every RAW format. The interface is dense with options — it's not beginner-friendly — but it produces excellent results. Batch processing works well once you set up a profile. darktable is the other major free option. It uses a non-destructive editing pipeline similar to Lightroom's approach. The learning curve is steep, but the depth of control is remarkable for free software. Adobe Lightroom is what most working photographers use. The subscription cost annoys people, but the RAW processing engine is genuinely excellent, especially for newer camera formats that get support quickly. Capture One is the studio photographer's choice. Particularly strong with medium format files and skin tones. Not free, but many professionals swear by it.When the Camera's JPG Is Good Enough
Hot take: for a lot of use cases, shooting RAW is overkill.
If you're taking photos in good light, with correct exposure, for use on social media or websites — the camera's JPG engine does a perfectly good job. Modern cameras, especially Fujifilm with their film simulations, produce JPGs that many people prefer over what they'd achieve processing RAW files themselves.
RAW shines when conditions are challenging (mixed lighting, high dynamic range scenes, low light) or when you need maximum editing flexibility. For a well-lit product photo or a properly exposed landscape on a sunny day, the JPG is often indistinguishable from a carefully processed RAW.
Converting RAW to JPG Online
When you receive RAW files and just need to see them or share them as JPGs, MyPDF's RAW to JPG converter handles the conversion without requiring any photography software. It supports CR2, CR3, NEF, ARW, DNG, and other common formats. Upload, convert, download.
This is particularly useful for non-photographers who receive RAW files from others — real estate agents getting photos from photographers, designers receiving product shots, that kind of scenario.
A Note on DNG as an Archival Format
If you're concerned about long-term access to your RAW files, Adobe's DNG format is worth considering for archiving. Proprietary formats like CR2 and NEF depend on continued support from software vendors. DNG is openly documented and widely supported. Tools exist to convert most proprietary RAW formats to DNG while preserving all the original sensor data.
It's insurance against the day your camera's format becomes obscure enough that new software stops supporting it.
Related Tools
- RAW to JPG — Convert camera RAW files to shareable JPGs
- RAW to PNG — Lossless conversion preserving maximum quality
- Image Compressor — Optimize converted JPGs for web use
- JPG to PDF — Compile photo sets into PDF portfolios