Convert J2K to PNM
Convert J2K images to PNM format, edit and optimize images online and free.
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The J2K file extension stands for JPEG 2000 Code Stream Syntax, a part of the JPEG 2000 standard developed by the Joint Photographic Experts Group (JPEG). Introduced in 2000, JPEG 2000 offers superior image compression and quality compared to the original JPEG format. The J2K codestream is highly flexible, supporting both lossy and lossless compression, and allows for scalable decoding, which means images can be efficiently accessed at various resolutions and quality levels. This makes J2K ideal for applications requiring high-quality image storage and transmission, such as medical imaging, digital cinema, and satellite imagery.
The PNM (Portable Anymap) file extension, developed by Jef Poskanzer in the 1980s, stands for Portable Any Map. It is an uncompressed raster graphics format designed for portable image storage and exchange, encompassing three sub-formats: PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap). PNM files store image data in plain text or binary format, ensuring easy usage across different platforms and applications. This format is widely supported by various image editing software and is valued for its simplicity and lossless compression.
Start uploading a J2K image by clicking the Choose File button or drag & dropping your J2K file.
For an advanced conversion, use the J2K to PNM optional tools available on the preview page and click the Convert button.
You will be redirected to the download page to see the conversion status and download your PNM file.
To change J2K format to PNM, upload your J2K file to proceed to the preview page. Use any available tools if you want to edit and manipulate your J2K file. Click on the convert button and wait for the convert to complete. Download the converted PNM file afterward.
Follow steps below if you have installed Vertopal CLI on your macOS system.
cd to J2K file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Windows system.
cd to J2K file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Linux system.
cd to J2K file location or include path to your input file.