Opening an SPW File

The SPW file type is primarily associated with KOMPAS-3D.

SPW	File extension: SPW
	File type:	data file

What is an SPW file?

SPW files mostly belong to KOMPAS-3D. SPW files are used by several specialized applications. Their purpose varies with the creator.
For example, many SPW files store 3D drawing data generated by KOMPAS-3D or T-FLEX CAD. These files often use a ZIP-based internal format that bundles design geometry, metadata, and other resources.
In other cases, an SPW file may contain a SigmaPlot worksheet or OriginLab data for scientific analysis such as spectroscopy measurements.
Additionally, some files with this extension serve to hold seismic waveform records (Sound Pool Waveform by SeWave) or lane change records used in traffic simulation with PTV Vissim.

3D drawing and design files — used in CAD applications (ASCON and T-FLEX CAD).

Scientific worksheets and data files — including SigmaPlot and spectroscopy data from OriginLab (SigmaPlot Details).

Seismic records and simulation logs — such as Sound Pool Waveform from SeWave (SeisComP3) and lane change data from PTV Vissim (PTV Vissim).

FilExt.com notes: This mix means the same extension hides different data types. To view an SPW file, open it with the software that created it. In some cases, checking if it can be opened as a ZIP archive might reveal more structure.

How to open SPW files

You need a suitable software like KOMPAS-3D to open an SPW 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 SPW file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a SPW file directly in the browser:. Just drag the file onto this browser window and drop it.

Online SPW Text Viewer

Choose your .spw file to analyze

or drag and drop it here

Online File Viewer

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SPW file format details:

To find out what program is needed to open SPW files, you need to determine the file format. The file format can be determined based on the file extension and the signature (the first few characters of a file). If the file extension or signature does not match the file format, errors will occur when opening or editing the file. When there is a problem with a file, the first step to solving it is to determine the file format. Below is our analysis of the SPW files:

SPW is rarely used as a file extension and is used by many programs, each with its own file format. The two most common formats are as follows:

• 15% of all SPW files start with the magic bytes 88 88 00 0C 4A 58 46 00 02 80 05 0C 01, which are always the first bytes of this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. SPW files can be up to 240 KB in size, but are often around 16 KB - 93 KB. Several words can almost always be found in the files, e.g. JSDataWorksheet and JSGraphicPage.
• 15% of all SPW files start with the bytes SeWave, which are crucial for this file format. They consist of unreadable binary data. A typical file size is 29 KB. The following keywords are characteristic: SeWave. The following filename is common: se20180601.spw.

All other SPW files (70%) have different formats, such as ZIP and Lane. Files like these are sometimes linked to spetsifikatsia or start. If you want to find out which format your SPW file belongs to, just click on the button "Choose your .spw file to analyze".