Opening BLW Files

The BLW file type is primarily associated with Sailwave.

BLW	File extension: BLW
	File type:	data file

What is a BLW file?

BLW files mostly belong to Sailwave. Sailing Race Results: A large proportion of BLW files store sailing race data, such as race timings and boat positions. These files are created by Sailwave. For more details, visit Sailwave website.
Other Uses:

Bathymetric Lidar Waveform: These files hold underwater depth data used in hydrographic mapping. They are produced by Surfer. See Surfer webpage for additional info.

Geomagnetic Field Model: In some cases, BLW files contain grid-based magnetic field data and land-water masks. This use is found in ArcGIS Pro. More information is available at ArcGIS Pro resources.

FilExt.com note: Always open these files with their respective applications, because they are not simple text files but specialized data containers.

How to open BLW files

You need a suitable software like Sailwave to open a BLW file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your BLW file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BLW file directly in the browser:. Just drag the file onto this browser window and drop it.

Online BLW Text Viewer

Choose your .blw file to view

or drag and drop it here

Online File Viewer

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How to extract texts from BLW files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

If you want to extract texts from BLW file or capture a screenshot, you can use our free Online BLW File Viewer:

Just click the "Choose your .blw file to view" button on this page.
Your BLW file will then be displayed in the browser.
Now click on "Save as..." at the top of the page.
Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
Your file will be converted and downloaded.

Programs that open and convert BLW files:

Sailwave
See the previous paragraphs to learn more about the main application. BLW files are often referred to as Sailwave data files because this type of file is primarily created or used by this software.
ArcView (World File For BIL Image) by ESRI
Related links: GIS Info

Technical Data for BLW File Extension

File classification:

Data

Related files:

shp, las, gdb, kml, blr, bil, fls, bip, avx, csv, tif, dxf

Related links:

GIS Info

Mime type:

text/plain

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: Blockworks model file
EXEFile: %ProgramFiles%\Blockworks\blockworks.exe %1

a blw data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with BLW files

Associate the BLW file extension with the correct application.
Update your software that should actually open data files. Because only the current version supports the latest BLW file format. Search, therefore, e.g. on the manufacturer website after an available Sailwave update.
To make sure that your BLW file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .BLW file online - secure, fast, and no downloads needed.