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Convert JPEG to CRW

Looking to turn a JPEG into a CRW file? Here's the honest answer — and what actually works instead.

You can't convert JPEG to CRW. CRW is a camera's own RAW format — it only ever comes out of the camera.

Why JPEG to CRW isn't possible

1

CRW is Canon's in-camera RAW

CRW is the raw sensor data a Canon camera writes at the moment of capture. It's produced by the camera's own hardware and firmware — software can read it, but nothing can manufacture a genuine CRW from a finished JPEG.

2

A JPEG has already been processed

Your JPEG is a developed, final image. The extra sensor information a CRW carries — wider dynamic range, full color depth, untouched highlights — was discarded when the photo was first saved, and can't be put back.

3

It is locked to one camera maker

CRW is proprietary to Canon. Even other RAW formats (NEF, ARW, RAF…) aren't interchangeable with it — there is no universal "save as RAW" that produces a real CRW.

The RAW formats — and where they come from

Every real RAW file is one of these camera-maker-specific formats, written by the camera itself:

DNGDigital NegativeAdobeCR2Canon Raw v2CanonCR3Canon Raw v3CanonARWSony Alpha RawSonyNEFNikon Electronic FormatNikonRAFFuji RawFujifilmRW2Panasonic RawPanasonicORFOlympus Raw FormatOlympusPEFPentax Electronic FilePentaxSR2Sony Raw 2SonyX3FSigma RawSigma3FRHasselblad RawHasselbladCRWCanon Raw (legacy)CanonNRWNikon Coolpix RawNikonK25Kodak DC25 RawKodakKDCKodak Digital Camera RawKodakDCRKodak Professional RawKodakMRWMinolta RawMinoltaSRFSony Raw (early)SonyERFEpson RawEpsonMEFMamiya RawMamiyaMOSLeaf RawLeafIIQPhase One RawPhase OneRWLLeica RawLeicaFFFHasselblad Flexible FileHasselblad

Format details

What is a JPEG file?

JPG (JPEG) is a lossy raster format that compresses photographs into small files by discarding detail the eye barely notices — the most widely used photo format on the web and in cameras.

Full name
Joint Photographic Experts Group
Developed by
JPEG Group
Released
1992
Extension
.jpeg
MIME type
image/jpeg
Transparency
No

How to open JPG opens in every browser, image viewer and editor with no special software.

Full JPEG format guide

What is a CRW file?

CRW is Canon's original raw format from early EOS and PowerShot cameras, storing unprocessed sensor data in a proprietary CIFF container before Canon switched to CR2.

Full name
Canon Raw (legacy)
Developed by
Canon
Released
1996
Extension
.crw
MIME type
image/crw
Transparency
No

How to open CRW opens in Canon Digital Photo Professional, older Lightroom and Camera Raw; convert to DNG for long-term archiving.

Full CRW format guide

What you can do instead

Convert JPEG to TIFF

Lossless and uncompressed — ideal for editing, archiving and print.

JPEG → TIFF

Convert JPEG to PNG

Lossless with transparency — perfect for graphics, logos and screenshots.

JPEG → PNG

Convert JPEG to JPG

A small, universal photo format that opens everywhere.

JPEG → JPG

Already have Canon RAW?

Convert your CRW and other camera RAW files to JPG, PNG or TIFF.

Open the converter

Frequently asked questions

Can any tool convert JPEG to CRW?
No. CRW stores the raw signal a Canon sensor recorded at capture. A JPEG is a finished image with that data already baked in and discarded — there's nothing for a converter to reconstruct.
Why would I want CRW anyway?
RAW formats like CRW give maximum editing latitude — but only when they come straight from the camera. Converting a JPEG to CRW would just wrap a finished image in a RAW container, with none of the benefits.
Is DNG different?
DNG is an open RAW container. You can convert a camera's own RAW (including CRW) into DNG, but you still can't turn a regular JPEG into CRW or any real RAW.
What can I convert my JPEG to instead?
JPEG converts cleanly to PNG, JPG, TIFF and WEBP — free, no sign-up, no watermark.