Convert raw grayscale images (GREY) online for free
The converter easily converts your GREY raw images to various formats - free and online. No XnView MP or or other Raster Image software needed.
The converter also works in reverse, so you can convert other "Headerless Grayscale Image" formats to GREY without using software like XnView MP or a similar tool.
A .GREY file is an uncompressed, raw image format containing only grayscale pixel intensity values. Often generated by scientific imaging software, topographical terrain mapping, and 3D mesh applications like Amira, these files store pure 8-bit or 16-bit data arrays without standard file headers, color palettes, or metadata.
The primary disadvantage of the .GREY format is its complete lack of structural information. Because there is no header, standard operating systems and web browsers have no idea what the image's dimensions or bit-depth are, resulting in "Windows cannot open this file" errors. Opening these files natively requires specialized viewers like XnView MP or command-line tools like ImageMagick, and usually forces the user to manually input the exact width and height of the image to prevent it from displaying as scrambled static.
To make these files usable, conversion is strictly required. For general web use and easy sharing, convert to PNG or JPG. For professional archiving or editing while retaining the high-bit-depth uncompressed data, convert to TIFF. Drag and drop your file to analyze and convert it - free, online, and without installing software.
Use Convert.Guru to open and convert your GREY file.
Users also converted GRY files.
If you want to convert GREY file to , you can use XnView MP or similar software from the "Raw Grayscale Image" category. In the File menu, look for Save As… or Export….
To convert files to GREY, try XnView MP or another comparable tool in the "Raw Grayscale Image" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our GREY converter.