Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.ECW
File Type
Enhanced Compressed Wavelet
Category
Image
Best first step
Use compatible software
Quick Summary
A practical overview of the .ecw file format
ECW (Enhanced Compressed Wavelet) is a proprietary geospatial raster image format developed by ERDAS (now part of Hexagon Geospatial). It is designed for efficient storage and retrieval of very large imagery datasets, such as aerial photographs, satellite imagery, and scanned maps. ECW files employ…
File extension
.ECW
File type
Enhanced Compressed Wavelet
Category
Image
Recommended action
Open with a trusted compatible app
How to open a .ecw file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .ecw.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .ecw file?
File extension details and usage information
ECW (Enhanced Compressed Wavelet) is a proprietary geospatial raster image format developed by ERDAS (now part of Hexagon Geospatial). It is designed for efficient storage and retrieval of very large imagery datasets, such as aerial photographs, satellite imagery, and scanned maps. ECW files employ wavelet compression, which allows for high compression ratios while maintaining good image quality. This makes them ideal for distributing and accessing large geospatial datasets over networks with limited bandwidth. The format supports multiple resolutions, allowing users to quickly view overview images and then zoom in to access finer details. ECW is commonly used in geographic information systems (GIS), remote sensing, and mapping applications. The compression algorithm is lossy, meaning some data is discarded during compression, but the goal is to minimize visual artifacts and preserve the overall information content of the image. ECW files often include georeferencing information, enabling them to be accurately positioned within a GIS environment. The format is particularly well-suited for handling large, continuous raster datasets, such as those covering entire countries or regions.
Software Compatibility
Programs that may open or work with .ecw files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .ecw files be converted?
Options for saving or exporting this file to another format
In many cases, a .ecw file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .ecw file.
Why can't I open a .ecw file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .ecw format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .ecw files
To open a .ecw file, use software that supports this file format.
- ERDAS Imagine
- ArcGIS Pro
- Global Mapper
- QGIS
- ENVI
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .ecw file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.