CR2 files are Canon's raw image format, and you convert them to JPG by opening them in photo software and exporting as JPG
A CR2 file is the raw image data straight from a Canon camera — it contains more detail and color information than a JPG, but most devices and websites won't open it. Converting to JPG makes your photos shareable and viewable everywhere, though you lose some of that extra detail in the process. The conversion itself takes seconds once you have the right software open.
You have three main routes: use free software on your computer, use an online converter, or use Canon's own software if you have it. Which one makes sense depends on how many files you're converting and whether you want to adjust the photo while you convert it.
Key Takeaways
- CR2 files need software that reads raw formats — standard photo viewers won't open them, but free tools like IrfanView, GIMP, and Photoshop Elements all work.
- Converting in photo software lets you adjust brightness, color, and sharpness before you save as JPG, while online converters are faster if you want no changes.
- Online converters work from any device with a browser, but they upload your photos to someone else's server, which matters if the images are private.
- Batch conversion — turning many CR2 files to JPG at once — is easiest in desktop software like IrfanView or Adobe Lightroom.
- JPG files are much smaller than CR2 files, so converting saves storage space and makes uploading to social media or email much faster.
Converting CR2 to JPG in free desktop software
The simplest free option on Windows is IrfanView. read it from irfanview.com, install it, then open your CR2 file. Go to File > Export As (or Save As), choose JPG from the format dropdown, and click Save. You can adjust quality with a slider — higher quality means a larger file. For most photos, 85 to 90 quality is a good balance between file size and sharpness.
On Mac or Windows, GIMP (gimp.org) is free and more powerful. Open your CR2 file, make any edits you want — adjust colors, crop, sharpen — then go to File > Export As, choose JPG, and save. GIMP shows you a quality slider before the final export. This route takes longer but gives you full control over how the photo looks.
If you already own Adobe Photoshop or Photoshop Elements, both open CR2 files natively. Open the file, make any adjustments, then File > Export As > JPG. The process is identical to GIMP but faster if you're already familiar with Adobe's interface.
Using online converters for quick one-off conversions
If you have just one or two CR2 files and don't want to install software, an online converter works. CloudConvert (cloudconvert.com) and Zamzar (zamzar.com) both accept CR2 uploads, let you choose JPG as the output format, and email you the result. Upload the file, select JPG, click convert, and read the result — the whole process takes a minute or two.
The trade-off is privacy: your photo goes to someone else's server during conversion. For personal snapshots this usually doesn't matter, but if the images are sensitive or confidential, converting on your own computer is safer. Also, online converters typically don't let you adjust the photo before converting — you get what the camera recorded, nothing more.
File size limits vary by service. Most free tiers accept files up to 100 MB, which covers most camera photos. If you're converting many files, the upload and read time adds up quickly, so desktop software is faster for batches.
Batch converting multiple CR2 files at once
If you have dozens of CR2 files from a shoot, converting one at a time wastes time. IrfanView has a batch conversion tool: open it, select File > Batch Conversion, choose your input folder (where the CR2 files are), set the output format to JPG, pick an output folder, and click Start. It converts every CR2 file in that folder to JPG without you touching anything else.
Adobe Lightroom (the subscription version, not the free Lightroom CC) also handles batch conversion well. Import your CR2 files into a collection, select them all, then File > Export Photos. Choose JPG as the format, set your quality and other options, and Lightroom exports all of them at once. This is slower than IrfanView but gives you more control over color and sharpness across the whole batch.
For Windows users who want something between free and paid, FastStone Image Viewer (faststone.org) has batch conversion and costs a one-time $20. It's faster than GIMP for large batches and simpler than Lightroom if you're not editing the photos, just converting them.
Adjusting quality and file size during conversion
When you export as JPG, you'll see a quality slider or number, usually from 1 to 100. Higher numbers mean better image quality but larger files. A CR2 file from a modern Canon camera is typically 25 to 40 MB. Converting to JPG at quality 85 to 90 shrinks it to 3 to 8 MB — still sharp enough for printing or sharing online, but much faster to upload.
If you're uploading to social media like Instagram or Facebook, quality 80 is usually fine because those sites compress JPGs anyway. For photos you might print or edit later, use 90 or higher. For web use only, 75 to 80 is acceptable and saves the most space.
Some software also lets you resize the image during export — shrinking a 6000-pixel-wide photo to 3000 pixels makes the file even smaller. This is useful if you're uploading to a website with size limits, but you lose detail if you shrink too much. For most uses, just adjusting the quality slider is enough.
What happens to your photo data when you convert
CR2 files store raw sensor data — every bit of color and brightness information the camera captured. When you convert to JPG, the software applies color correction, sharpening, and compression. Some detail is lost permanently, which is why photographers who edit heavily prefer to keep the CR2 file as a backup.
If you're just sharing photos online or printing them, this loss doesn't matter — JPG quality at 85 to 90 looks identical to the original to the human eye. But if you think you might want to adjust the photo's colors or exposure later, save the CR2 file too. You can always convert again if you change your mind about the settings.
The JPG format also uses lossy compression, meaning it throws away some data to make the file smaller. Every time you open a JPG, edit it, and save it again, you lose a little more detail. CR2 files don't have this problem — you can open and save them as many times as you want without degradation. This is another reason photographers keep the raw file.
Choosing between desktop software and online converters
| Method | Best for | Speed | Privacy | Editing |
|---|---|---|---|---|
| IrfanView (Windows) | Quick single conversions or batches | Fast | Your computer only | No |
| GIMP (Mac/Windows) | Converting and editing in one step | Slow | Your computer only | Yes |
| Photoshop or Elements | Professional editing plus conversion | Fast | Your computer only | Yes |
| Online converter (CloudConvert, Zamzar) | One or two files, no software install | Slow (upload/read) | Server-based | No |
| Adobe Lightroom | Large batches with color control | Medium | Your computer only | Yes |
Frequently Asked Questions
Can I convert CR2 to JPG on my phone?
Most phone apps don't read CR2 files natively because they're Canon-specific raw formats. You can use an online converter on your phone's browser — upload the CR2 file and read the JPG — but it's slower than desktop software. If you shoot on a Canon camera, converting on your computer before transferring photos to your phone is usually faster.
Will converting CR2 to JPG make the photo look worse?
At quality 85 or higher, the difference is invisible to the human eye. You lose some color data in the compression, but you won't see it in prints or on screens. If you're printing large posters or doing heavy editing, the loss matters more. For sharing online or casual printing, JPG quality 85 looks identical to the original.
What if I need to convert back from JPG to CR2?
You can't — once you convert to JPG, the raw data is gone and can't be recovered. Converting back to CR2 just creates a fake raw file with no extra information. Always keep your original CR2 files if you think you might edit the photo later. Store them on an external drive or cloud backup if space is tight.
Do I need Canon's software to convert CR2 files?
No. Canon's Digital Photo Professional software works, but it's not necessary. Free tools like IrfanView and GIMP handle CR2 conversion just as well and are simpler to use. Canon's software is useful if you're doing heavy color correction, but for basic conversion, any software that reads raw formats works fine.
How much smaller is a JPG than a CR2 file?
Typically 5 to 10 times smaller. A CR2 file from a modern Canon camera is usually 25 to 40 MB. The same photo as JPG at quality 85 is 3 to 8 MB. This matters when uploading to email (which often has size limits) or uploading to websites. The smaller file also takes up less storage on your computer or phone.