A CR2 file is a raw image format used by Canon digital cameras

CR2 stands for Canon Raw 2, and it is the file format that Canon cameras save when you shoot in raw mode instead of JPEG. Raw files contain the unprocessed data directly from the camera's sensor, which means they hold more detail and color information than a compressed JPEG. When you open a CR2 file, you are working with the original image data before any camera processing has been applied.

The main reason photographers use CR2 files is flexibility in editing. Because raw files preserve all the sensor data, you can adjust exposure, white balance, and color without losing image quality the way you would with a JPEG. The trade-off is that CR2 files are much larger — typically 30 to 50 megabytes each — and they require specific software to view and edit.

Key Takeaways

  • CR2 files are raw image files created by Canon cameras and contain unprocessed sensor data that gives you more control during editing.
  • You cannot open CR2 files in standard image viewers like Windows Photos or Preview — you need software that supports raw formats.
  • Adobe Lightroom and Photoshop both handle CR2 files natively, and free options like RawTherapee and Darktable also work.
  • CR2 files take up significantly more storage space than JPEGs from the same camera, so plan your storage accordingly.

Software that opens CR2 files

Adobe Lightroom is the most common choice for photographers working with CR2 files. It imports them directly, lets you adjust exposure and color in a non-destructive way, and exports to JPEG or other formats when you are ready. Adobe Photoshop also opens CR2 files, though Lightroom is usually faster for managing large batches.

If you do not have Adobe software, RawTherapee and Darktable are free programs that handle CR2 files. Both let you adjust exposure, white balance, and color, then export to standard formats. Capture One is another paid option that many professionals use, especially if you shoot tethered (connected to a computer while shooting).

On Mac, Apple Photos can import and view CR2 files, though editing options are limited. Windows does not have built-in CR2 support, so you will need third-party software. Some online services like Google Photos accept CR2 uploads, but they convert them to their own format rather than preserving the raw data.

Why your camera creates CR2 files

When you set your Canon camera to raw mode, it saves every pixel of data the sensor captures before applying any processing. A JPEG, by contrast, is processed in-camera — the camera decides the white balance, sharpness, and color saturation, then compresses the image. Once that happens, you cannot recover the original data if you want different settings.

Raw files let you make those decisions later, on your computer, with more precision. You can recover detail in blown-out highlights or dark shadows that would be lost in a JPEG. This is why professional photographers and serious hobbyists shoot raw, even though the files are larger and require more work to process.

Converting CR2 files to other formats

CR2 files are not meant to be permanent storage — they are working files. Once you have edited a CR2 in Lightroom or Photoshop, you export it as a JPEG, PNG, or TIFF for sharing or printing. The original CR2 stays on your computer as a backup in case you want to re-edit it later with different settings.

To convert a CR2 to JPEG in Lightroom, select the image, go to File > Export, choose JPEG as the format, and set your quality level. In Photoshop, open the CR2, make your edits, then go to File > Export As and choose your format. Free software like RawTherapee has an Export button that works the same way.

Batch conversion is possible if you have many CR2 files. Lightroom lets you select multiple images and export them all at once with the same settings. This is much faster than converting one at a time, especially if you have hundreds of photos from a shoot.

Storage and backup for CR2 files

Because CR2 files are large, storage becomes a real concern if you shoot raw regularly. A single day of photography can easily create 10 to 20 gigabytes of CR2 files. Most photographers keep their raw files on an external hard drive or cloud storage, separate from their edited JPEGs.

A common workflow is to import CR2 files to a dedicated external drive, edit them in Lightroom, then export the final JPEGs to another location. This way, your raw files stay safe as a backup, and your JPEGs are what you actually use and share. If you ever need to re-edit a photo with different settings, the original CR2 is still there.

CR2 versus other raw formats

Canon uses CR2, but other camera brands have their own raw formats. Nikon uses NEF, Sony uses ARW, and Fujifilm uses RAF. The software that opens them is usually the same — Lightroom and Photoshop handle all of them — but you cannot open a Nikon NEF file with Canon-specific software.

Some photographers convert all their raw files to a universal format called DNG (Digital Negative) as a long-term archival strategy. DNG is an open standard, which means it is less likely to become unreadable if Canon stops supporting CR2 in the future. Lightroom can convert CR2 to DNG automatically during import if you want that extra security.

Frequently Asked Questions

Can I open a CR2 file on my phone?

Most phone apps do not support CR2 files natively. Some cloud services like Google Photos or Adobe Cloud will accept CR2 uploads, but they convert them rather than preserving the raw data. If you need to view or edit CR2 on a phone, your best option is to export them as JPEG first, or use a remote desktop app to access your computer.

Why is my CR2 file so large?

CR2 files contain all the unprocessed data from your camera sensor, which is why they are 30 to 50 megabytes or more. A JPEG is compressed and processed in-camera, so it is much smaller. The larger size is the trade-off for having more editing flexibility and detail preserved.

What happens if I delete a CR2 file?

If you delete a CR2 file, you lose the original raw data. You cannot recover the editing flexibility that raw provides. This is why photographers keep CR2 files as backups even after exporting JPEGs — if you want to re-edit a photo later, you need the original raw file.

Do I need special software just to view CR2 files?

Yes, standard image viewers like Windows Photos or Mac Preview do not recognize CR2 files. You need software that supports raw formats, such as Lightroom, Photoshop, RawTherapee, or Darktable. Some online services will display CR2 files if you upload them, but you cannot view them locally without the right software.

Can I edit a CR2 file in Photoshop without Lightroom?

Yes, Photoshop opens CR2 files directly. When you open a CR2 in Photoshop, it launches Adobe Camera Raw, which is the same raw editing interface Lightroom uses. You can adjust exposure, white balance, and color there, then continue editing in Photoshop if needed. Lightroom is often preferred for managing many raw files, but Photoshop works for individual images.