.CRW file extension

To open .CRW files on Windows, right-click the .CRW file and select 'Open with'.

.CRW files are Canon RAW image files. Use compatible software like Canon's Digital Photo Professional or Adobe Lightroom to open them.

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Last updated: June 11, 2026 · Reviewed by Julian Stricker

What “reviewed” means on this page

Format fit: whether the “what is this file?” description matches common real-world use of the extension, including category, typical MIME types, and aliases.
Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps; we remove fantasy menus and unsafe shortcuts.
Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
Sources and further reading: whether external links point to vendors, standards bodies, or other primary references where possible; we avoid inventing details we cannot ground.
Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless.

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Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .CRW files

Use these platform-specific instructions to open .CRW files safely.

Windows

Right-click the .CRW file and select 'Open with'.
Choose Canon Digital Photo Professional or another compatible app.

Full Windows guide

Mac

Control-click the .CRW file and select 'Open With'.
Choose an app like Adobe Lightroom or Preview if supported.

Full Mac guide

Linux

Use a photo editor like Darktable or RawTherapee to open the .CRW file.
Install the necessary software via your package manager if not available.

Full Linux guide

iOS

Open the .CRW file in Files and share it to an app like Adobe Lightroom Mobile.

Full iOS guide

Android

Use an app like Adobe Lightroom Mobile to open and edit the .CRW file.

Full Android guide

Security notes

Always download .CRW files from trusted sources.
Regularly update your image editing software to patch security vulnerabilities.
Avoid opening .CRW files from unknown emails or websites.

Complex decoders and untrusted media

Image, audio, and video decoders are large software surfaces; issues are uncommon for everyday files but show up with crafted files from unknown sources. Keeping the OS and media apps updated matters most; scanning is reasonable extra caution for downloads you cannot vouch for.

Avast

Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.

Norton

Norton 360 delivers comprehensive antivirus protection, VPN, and identity theft monitoring. Scan files for threats before opening to keep your device secure.

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Can't open this file?

These are the most common causes and fixes when .CRW files fail to open.

Common reasons

CRW file won't open
Poor image quality after editing

Fix steps

Install or update a compatible application like Canon Digital Photo Professional.
Check the file's integrity and ensure it was downloaded correctly.

OS-specific troubleshooting

What is a .CRW file?

.CRW is a file format for raw images captured by Canon digital cameras. It contains unprocessed data directly from the camera's sensor, allowing for high-quality image editing. This format is primarily used by photographers who require detailed image adjustments.

Background

.CRW files are among the earliest raw image formats developed by Canon for their digital cameras. These files store unprocessed image data, which provides photographers with a high degree of control over exposure, white balance, and other settings during post-processing. Unlike JPEGs, CRW files do not lose quality when edited, making them ideal for professional photography and detailed image work. However, due to their proprietary nature, CRW files may not be supported by all image viewers or editors, necessitating the use of specific software like Canon's Digital Photo Professional or Adobe Lightroom. Over time, Canon has transitioned to newer formats like CR2 and CR3, but CRW remains relevant for users of older Canon models.

Common MIME types: image/x-canon-crw

Common .CRW issues

CRW file won't open

This issue occurs when the necessary software is not installed or the file is corrupted.

Install or update a compatible application like Canon Digital Photo Professional.
Check the file's integrity and ensure it was downloaded correctly.

Poor image quality after editing

This can happen if the file is edited in non-compatible software.

Use software specifically designed for raw files, such as Adobe Lightroom.
Ensure that the software supports the CRW format fully.

FAQ

Can I convert a CRW file to JPEG?

Yes, use software like Adobe Lightroom or Canon Digital Photo Professional to export the CRW file as a JPEG.

Why can't I open CRW files with my default image viewer?

CRW files are raw formats requiring specific software for viewing and editing, unlike standard image formats.

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