.dng

What is a .dng file?

DNG is Adobe's open RAW format — a universal standard designed to prevent proprietary camera RAW files from becoming unreadable.

Safe format
Type Image
By Adobe
MIME image/x-adobe-dng

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What is it

You have a .dng file — Adobe's attempt to solve the RAW format fragmentation problem. Every camera brand invents its own proprietary RAW format (Canon CR2/CR3, Nikon NEF, Sony ARW), and there's no guarantee today's software will read them in twenty years. DNG (Digital Negative) is Adobe's open standard for archiving camera RAW data.

Some cameras shoot DNG natively (many Leica, some Samsung, many smartphone cameras including Google Pixel and recent iPhones in ProRAW mode). For cameras that don't, Adobe's DNG Converter (free) translates proprietary RAW files to DNG. The conversion preserves all sensor data and EXIF metadata. The debate about DNG vs native RAW is ongoing — purists prefer keeping the original file; archivists prefer the open format.

Adobe Lightroom and Camera Raw handle DNG natively — it is, after all, Adobe's format. Darktable and RawTherapee (both free) support DNG well. For long-term archival of photographs, DNG is the safest bet — it's an open format that won't become unreadable when a camera manufacturer stops updating their codec. Convert to DNG and keep the originals if you're cautious.

Technical details
Full Name
Digital Negative
MIME Type
image/x-adobe-dng
Developer
Adobe
Magic Bytes
N/A
Safety
.dng is a known, safe format.
What opens it
Adobe Lightroom
Subscription All
darktable
FREE All
RawTherapee
FREE All
FAQ
Should I convert my RAW files to DNG?
For archival: yes — DNG is an open standard less likely to become unreadable in 20 years. For daily editing: optional — Lightroom handles both equally well. If you convert, consider keeping originals until you're confident in the conversion.
Is DNG lossy?
By default, DNG conversion is lossless — all sensor data is preserved. Adobe's DNG Converter offers an optional lossy compression mode that reduces file size with minimal quality impact. The standard conversion preserves everything.
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