What is an ECW file?
Most often, an .ECW file is an Enhanced Compression Wavelet Image. Earth Resource Mapping originally developed this format to store large satellite and aerial photographs. The format compresses massive geospatial images while keeping high visual quality. Today, Hexagon owns and maintains the format, which is a standard in the Geographic Information System (GIS) industry.
However, an .ECW file can also be a compressed presentation file for Seewo Whiteboard software, or a word list file used by EclipseCrossword. Because .ECW has multiple possible meanings, viewer.online/ecw analyzes .ECW files to identify their exact format and creator software.
How to open ECW files?
GIS professionals typically open .ECW files with mapping software like ERDAS IMAGINE, QGIS, or ArcGIS Pro. If you have a crossword file, you need EclipseCrossword. If you have an electronic courseware presentation, you need Seewo Whiteboard.
If you are unsure what kind of file you have, viewer.online/ecw shows which programs can open the file and usually previews it.
Best practices and troubleshooting
Sharing .ECW images with people who do not have specialized mapping software can be difficult. We recommend file conversion to sensible target formats like .TIFF, .JPEG, or .PNG on convert.guru. Keep in mind that converting a highly compressed .ECW file to an uncompressed format like .TIFF may result in a very large file.
Summary
Whether you have a massive satellite image or a simple crossword puzzle, viewer.online/ecw directly opens and previews .ECW files in the browser, eliminating the need to install software or troubleshoot compatibility issues.