About CR2 Files
Canon RAW CR2
CR2 is Canon camera RAW format containing unprocessed sensor data.
Family
Raster & Vector Images
Extension
.cr2
MIME Type
image/x-canon-cr2
Can Use As
43 52 32 46 00 01 00 00 4B 41 49 4A
ASCII: CR2F....KAIJ
📈 Target Minimum File Size (Guaranteed ≥ KB)
Lossless JPEG Q100 + standard COM segment padding for government & exam portals
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HOW CR2 CAME TO BE.
Canon CR2 (Canon RAW version 2) shipped in 2004 with the EOS-1D Mark II, replacing the earlier CRW format that had been used since the D30 (2000). Technically CR2 is a TIFF variant — specifically a TIFF/EP file with Canon’s own proprietary metadata tags for shooting parameters, picture styles, and lens-correction data.
Canon maintained CR2 for over 13 years, through every Rebel, 5D Mark II/III/IV, and 1D series body until 2018, when the EOS M50 introduced CR3. A CR2 file from 2004 still opens in modern Canon DPP or Adobe Camera Raw — a remarkable feat of backward compatibility.
Technical Specifications
- MIME type
- image/x-canon-cr2
- Extension
- .cr2
- Container
- TIFF/EP with Canon private tags
- Bit depth
- 14-bit (most bodies); 12-bit (some)
- Successor
- .cr3 (EOS M50 onward, 2018)
Typical Sizes & Weights
22 MP CR2 (5D Mark III)
25-35 MB
50 MP CR2 (5DS/5DS R)
55-75 MB
STRENGTHS & LIMITATIONS.
Strengths
- Mature — 13 years of camera bodies and tooling.
- Preserves every bit of Canon sensor data for post-processing.
- Embedded JPEG preview makes browsing fast.
- Supported by every major raw processor.
Limitations
- Proprietary — no official spec, tool support depends on reverse engineering.
- Canon-only tags (Picture Styles, DPP adjustments) are lost when processed outside DPP.
- Superseded by CR3 in 2018 — format is frozen.
- File sizes are large (20-40 MB typical).
CURIOSITIES & TRIVIA.
CR2 is a TIFF file under the hood — the format extension is Canon's private IFD (Image File Directory) of tags.
Every Canon DSLR from 2004 to 2018 shot CR2 — billions of RAW files in the format still exist in wedding, sports, and nature photographer archives.
The CR2 file contains a full-resolution JPEG preview alongside the raw sensor data — which is what most software uses for thumbnails.
Canon DPP (Digital Photo Professional) is the only software that applies Canon Picture Styles exactly as the camera intended.
Canon does not publish the CR2 specification — every third-party RAW processor (Lightroom, Capture One, Darktable) reverse-engineered it.
Specialized Utilities for .CR2 Files
Compress Image to 20KB
Compress signature scans, stamp images, and ID photos to strictly ≤ 20 KB (20,000 bytes) for strict online exam and government application portals using binary-search JPEG quantization.
Compress Image to 50KB
Compress JPG, PNG, or WebP photos to strictly under 50 KB (50,000 bytes) for passport portals, university admissions, civil service forms, and KYC uploads without changing pixel dimensions.
Compress JPG to 100 KB
Upload a JPG and download a decodable JPG at or below 100,000 bytes. If the limit cannot be reached, no output is offered.
Crop Image & Photo Resizer
Crop and resize JPG, PNG, WEBP, and AVIF images to exact pixel dimensions, social media aspect ratios, or custom print DPI online for free.
Resize Image
Resize images to exact dimensions or scale by percentage. Lock aspect ratio to prevent distortion. Supports all common image formats.
PNG Compressor — Reduce PNG Size Preserving Transparency
Compress PNG images up to 80% while preserving full alpha-channel transparency, or lock exact file size targets (20 KB, 50 KB, 100 KB).
WEBP Compressor — Optimize WebP for Core Web Vitals
Compress WEBP images for ultra-fast page loads and Lighthouse scores with fine-grained quality sliders and exact byte targets.
Favicon Generator — Multi-Resolution .ICO from PNG, SVG or WEBP
Generate a production-ready multi-resolution favicon.ico containing 16x16, 32x32, 48x48, 64x64, 128x128, and 256x256 alpha layers from any logo.
EXIF Metadata Remover
Strip hidden GPS coordinates, camera serial numbers, timestamps, and XMP/IPTC metadata from JPG, PNG, WebP, and TIFF photos before sharing online.
Image to Text (OCR)
Extract text from images using optical character recognition. Supports photos of documents, screenshots, receipts, and handwritten notes in 100+ languages.
JPG to Word Converter (OCR)
Convert scanned JPG, PNG, and WEBP images into editable Microsoft Word (DOCX) documents using 12-language optical character recognition (OCR).
CONVERT FROM CR2
Common Use Cases
Canon DSLR photography
Related Formats
Popular comparisons
CR2 vs JPG
Differences, file size, and when to choose each format.
CR2 vs PNG
Differences, file size, and when to choose each format.
CR2 vs WEBP
Differences, file size, and when to choose each format.
CR2 vs AVIF
Differences, file size, and when to choose each format.
CR2 vs GIF
Differences, file size, and when to choose each format.
CR2 vs BMP
Differences, file size, and when to choose each format.
Popular CR2 conversions
The most-requested destinations when starting from CR2.
Frequently Asked Questions
CR2 (Canon RAW CR2) is an image format used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family and designed around a specific trade-off between file size, visual fidelity, and feature support (transparency, colour depth, compression type). Photographers, web designers, and content creators choose CR2 when its particular strengths match the publishing target.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) open CR2 natively. On mobile, iOS Photos and Google Photos display CR2 in the gallery when supported by the OS. If the format is rare or new, convert to JPG or PNG first — both are universally readable — using our CR2 to JPG or CR2 to PNG converter.
Upload the CR2 to KaijuConverter and pick a target format (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG, PDF). The conversion runs in the browser via ImageMagick and returns a download in seconds. No account or installation required; both input and output delete automatically within two hours.
It depends on the task. JPG is the smallest file size for photographs; PNG is lossless with transparency; CR2 has its own niche that may favour colour depth, animation, or encoding efficiency over one or both of those. For the final web publish, test all three and measure file size plus visible quality on real content.
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