What is a BIL file?
A .BIL file is most commonly an ESRI BIL File. The acronym stands for Band Interleaved by Line. This format stores geographic raster data, such as satellite imagery or surface elevation models. The format is a standard widely used by ESRI and the PRISM Climate Group.
However, the .BIL extension has multiple possible meanings. It is also used as a receipt information data file by ADDISON financial software, a heating system data log by Siemens, and a medical billing claim format by the Thai Social Security Office. Because of these variations, you should verify the true source of your file.
How to open BIL files?
If your file is an ESRI BIL File, you can open it with geographic desktop applications. Popular choices include ArcGIS Pro, QGIS, and GRASS GIS. For geographic data, these files usually require accompanying header files, such as .HDR or .STX, to load and display correctly.
If your file contains financial receipts or building logs, you must open it in the original software that created it. You can also try inspecting the file contents with a basic text editor or a command-line tool like `cat` to see if it contains readable text data.
File conversion
You can convert raster-based .BIL files to standard image and spatial formats like .TIF or .PNG using spatial libraries like GDAL. For quick and accessible online conversions, we recommend converting your files on convert.guru.
Inspect and view BIL files online
Because the .BIL extension serves many different purposes, we recommend using viewer.online/bil to identify the actual format of your file. The platform can analyze .BIL files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
In summary, viewer.online/bil is useful for identifying, inspecting, and understanding .BIL files without installing expensive GIS suites or financial software, avoiding potential compatibility problems altogether.