Your RAW file won't open because it's raw camera-sensor data in a manufacturer-specific format — CR2, NEF, ARW and the rest — that Windows, phones and most apps don't recognise without extra software. Often the file is fine; your software just doesn't speak that format yet. The quickest fix is to convert it to a universal format like JPG.
Why RAW files won't open
RAW isn't a standard image format — each brand stores sensor data its own way (Canon CR2/CR3, Nikon NEF, Sony ARW, and so on). Everyday apps, Windows Photos, phone galleries and web upload forms are built for JPG and PNG, so they either show a blank thumbnail or refuse the file entirely. Nothing is broken; the format is simply unsupported there.
Is it a new format your software doesn't know yet?
Very often, yes. When a camera maker releases a new body (Canon's move from CR2 to CR3 is the classic example), existing editors can't read the new RAW until they're updated. If last year's photos open but this year's camera won't, an out-of-date RAW decoder is the usual cause — and converting the file sidesteps the problem completely.
How to open a RAW file
- Use the camera maker's free software (Canon DPP, Nikon NX Studio, etc.) — accurate but heavy to install.
- Use Adobe Lightroom or Camera Raw — powerful, but subscription software.
- Convert it to JPG or PNG — the fastest route if you just need to view, share or upload the photo.
The fastest fix: convert to JPG or PNG
If you don't need to deep-edit the file, converting is quicker than installing anything. Convert RAW to JPG (or RAW to PNG for a lossless copy) works right in your browser, so nothing uploads. There are per-brand tools too: CR2 to JPG, NEF to JPG, and ARW to JPG. Step-by-step help is in how to convert RAW photos to JPG.
Which RAW format does my camera make?
Canon → CR2/CR3 · Nikon → NEF · Sony → ARW · Fujifilm → RAF · Olympus/OM → ORF · Panasonic → RW2 · many phones and drones → DNG. If you're not sure which is which or how they compare, the RAW photo formats guide breaks down all of them.