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Easily convert your J2K files online with no registration required. Convert your J2K documents from Windows, Linux, or macOS. Simply drag and drop your file into the upload form, select the desired output format, and click the convert button. Once the conversion is complete, you can download your XLTX file.
Depending on the J2K file's size and format, conversion may take a few moments, but most files convert quickly. With advanced features, you can convert password-protected documents and have the results sent to your email.
Convert your J2K documents anytime, anywhere, on any device—including mobile. Use this conversion app online 24/7—free for basic conversions.
Check our videoJPEG 2000 Code Stream (J2K) is a highly efficient image compression format designed for high-quality imaging, offering superior compression ratios and lossless/lossy compression options compared to traditional JPEG. It is widely used in medical imaging, digital cinema, and archival applications, with support in tools like Kakadu, OpenJPEG, and Adobe Photoshop. The format employs wavelet-based compression, supports multiple color spaces, and includes advanced features like region-of-interest coding, progressive decoding, and metadata embedding for enhanced flexibility and scalability.
XLTX is a file format used for Excel Open XML Spreadsheet Templates, designed to store pre-formatted spreadsheet layouts for creating consistent and reusable Excel documents. It is supported by Microsoft Excel, LibreOffice Calc, and other spreadsheet applications, enabling users to create, edit, and share templates across platforms. The format is based on XML and ZIP compression, allowing for structured data storage, advanced formatting, and customization options such as formulas, styles, and macros.
You can also convert J2K into many other file formats. Please see the complete list below.