CR2 to SUN Converter

Convert your CR2 images to SUN online for free

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Multiple at Once

No need to convert one by one — queue several CR2 images and convert the whole batch to SUN in a single session.

Fast Results

Most CR2 to SUN conversions complete in seconds. Cloud infrastructure ensures your Canon RAW photos are processed quickly and efficiently.

Instant Access

Jump straight into CR2 to SUN conversion with zero setup. No account creation or login required — the tool is ready when you are.

How to convert CR2 to SUN

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose sun or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sun file right afterwards

About formats

CR2 (Canon RAW version 2) is Canon's second-generation proprietary RAW image format, introduced in 2004 with the EOS-1D Mark II and used across Canon's DSLR lineup until the transition to CR3 beginning in 2018. CR2 files use a TIFF-based container that stores the raw sensor data compressed with a lossless variant of JPEG encoding (Huffman-coded prediction residuals), keeping file sizes manageable while preserving every bit of the original capture. Each CR2 file contains multiple image sections: a small thumbnail, a mid-size preview JPEG suitable for quick review, and the full-resolution RAW data at 14-bit depth on most bodies. The format records extensive shooting metadata including Canon's proprietary tags for lens model, autofocus point selection, Picture Style settings, dust-delete data from the sensor cleaning reference shot, and per-body calibration information. One advantage is the vast software ecosystem — CR2 is one of the most widely supported RAW formats in existence, handled natively by Adobe Lightroom, Capture One, DxO, RawTherapee, darktable, and dozens of other converters and viewers, owing to Canon's dominant market share during the DSLR era. Reliable archival longevity is another key strength: the TIFF-based structure and well-documented layout make CR2 files relatively straightforward to parse even with custom tools, and the format's ubiquity means archival support will persist for decades.
Developer: Canon
Initial release: 2004
SUN is a raster image format associated with Sun Microsystems workstations, encompassing both the Sun Raster format (.ras) and the Sun Icon format used for window system icons and cursors on SunOS and Solaris systems. Sun Raster files, identifiable by their 0x59a66a95 magic number, store bitmap images in 1-bit monochrome, 8-bit indexed color, 24-bit BGR, or 32-bit XBGR modes, with optional run-length encoding compression and a 32-byte header. The Sun Icon subset is a simpler text-based format used for small monochrome bitmaps — window icons, cursor images, and toolbar graphics — stored as C-language data arrays that could be directly compiled into X Window and SunView applications. These icon files begin with a comment block specifying width, height, and optionally hot spot coordinates (for cursor images), followed by hexadecimal pixel values in a format readable by both the C compiler and the iconedit tool. Sun workstations running SunOS and later Solaris were foundational platforms for Unix computing, networking, and the early internet, and the SUN image formats were integral to their graphical environments. One advantage is the format's dual text/binary nature: Sun Icons are valid C source code that can be #included directly into applications, a practical approach to resource embedding that predates modern asset management systems. The Sun Raster variant's simplicity provides another strength — the 32-byte header and straightforward encoding make it one of the easiest binary image formats to parse. SUN format files are supported by ImageMagick, GIMP, XnView, and Unix image viewing tools.
Developer: Sun Microsystems
Initial release: 1982

Frequently Asked Questions

Why convert CR2 to SUN?

SUN is a Sun/Oracle workstation image format. Converting from Canon CR2 produces images compatible with Solaris and Unix imaging environments.

What programs open SUN?

Programs that handle SUN include Sun/Oracle tools, GIMP, IrfanView, and XnView.

Is CR2 to SUN conversion free on Convertio?

Standard CR2 to SUN conversions are free on convertio.tools. Larger volumes or bigger images may benefit from a premium account for faster processing.

What resolution can I convert?

The converter handles CR2 images at their original resolution — from compact camera shots to high-megapixel Canon sensor outputs.

Do I need to install software?

No installation required. The CR2 to SUN converter runs entirely in your web browser — just upload, convert, and download the result.

How long does the conversion take?

Most CR2 to SUN conversions finish in seconds. Processing time depends on image resolution and server load, but results are typically fast.