Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your CR2 images to JXL format. This tool works for both professionals and casual users. Convert your images to JXL in seconds.
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Canon RAW 2
The standard raw format for Canon DSLRs from 2004 to 2018.
CR2 (Canon Raw version 2) is the proprietary raw image format used by Canon EOS digital SLR cameras from the mid-2000s until the introduction of the CR3 format in 2018. If you shot with a Canon 5D Mark II, 7D, or Rebel T3i, you have thousands of these files. Like all raw formats, a CR2 file contains the unprocessed data from the image sensor. It is not an image yet; it is a dataset of light intensity values that must be 'demosaiced' by software to create a viewable picture. This allows you to change the white balance, recover highlights, and pull detail out of shadows long after the photo was taken.
CR2 is based on the TIFF file structure. It uses lossless compression to store the sensor data, which is typically 12-bit or 14-bit depending on the camera model. The file contains the raw image data, a full-size JPEG preview (for reviewing on the camera screen), and extensive 'MakerNotes' metadata that records every camera setting, from the lens used to the focus point selected.
CR2 replaced the older CRW format in 2004 with the release of the EOS 20D. It remained the standard for 14 years, making it one of the most widely supported and understood raw formats in history. It was eventually succeeded by CR3, which offers better compression.
JPEG XL
The true next-generation successor designed to replace JPEG, PNG, and GIF entirely.
JPEG XL (JXL) is the most advanced image format currently in existence. Unlike WebP and AVIF, which are derived from video codecs, JPEG XL was designed from the ground up specifically for still images. This gives it unique superpowers, such as the ability to losslessly re-compress existing JPEG files to be 20% smaller without losing a single bit of data. It offers best-in-class lossless compression (beating PNG), best-in-class lossy compression (beating JPEG), and supports features needed for professional workflows like CMYK, layers, and ultra-high resolutions. However, its adoption has been slowed by political battles, most notably Google Chrome's decision to remove support in 2022, though Apple has since added full support in Safari 17.
JPEG XL uses a combination of two coding modes: VarDCT (Variable Block-size DCT) for lossy images and Modular Mode for lossless/artistic images. Its 'killer feature' is legacy JPEG transcoding: it can take the DCT coefficients from an old JPEG file and repackage them into the more efficient JXL container. This process is reversible, meaning you can convert your entire JPEG library to JXL to save 20% space, and convert them back to the exact original byte-for-byte JPEGs later if needed. It also supports 'progressive decoding' far better than any other format, allowing a high-quality preview to appear almost instantly.
The JPEG committee began the call for proposals for a next-gen standard in 2017. The final standard (ISO/IEC 18181) was published in 2021/2022, combining the best parts of Google's PIK and Cloudinary's FUIF proposals. Despite being technically superior, its rollout hit a wall when the Chrome team removed the experimental flag in late 2022, citing lack of ecosystem interest. However, Apple's adoption in 2023 (iOS 17/macOS 14) has breathed new life into the format.
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