What is an SLP file?
The .SLP file extension serves many different purposes depending on the software that created it. Most frequently, it is a Slippi Game Replay file created by Project Slippi to record Super Smash Bros. Melee matches played on the Dolphin emulator. Another common use is the ArtDesk SLP Writer game animation graphics format, or the legacy graphic shape file used by Ensemble Studios for Age of Empires.
Other software also uses the .SLP extension. It is used for data integration pipeline files in SnapLogic, audio production projects in Soundtrap Studio, animal pose tracking labels in SLEAP, and 3D printing slice data for Stratasys machines. It is also used as a SpectraLayers Pro Project file by MAGIX and an encrypted protected file container by Microsoft Information Protection.
How to open SLP files?
Because .SLP files can contain completely different data formats—such as raw game inputs, JSON text, HDF5 datasets, ZIP archives, or binary audio data—you must know the file's origin to open it correctly. You can load game replays using the Slippi Desktop App. Audio projects require specific editors, like MAGIX SpectraLayers or Soundtrap. If the file is a SnapLogic pipeline configuration, it is formatted as JSON and can be opened in any text editor.
Inspecting SLP files
If you do not know which application created your file, viewer.online/slp can analyze .SLP files to identify the exact format and creator software. It allows you to inspect the file structure, extract readable text, and check whether an online preview is available.
Best practices and troubleshooting
When sharing .SLP game replays, ensure the recipient has the correct emulator installed, as the file only contains controller inputs, not video data. If your file is a 3D printing slice data file, you will need CAD software like SolidWorks to process it. If a file fails to open, it might be an encrypted container that requires specific Microsoft credentials to unlock.
Summary
The .SLP file extension represents multiple formats, from game replays and graphics to complex audio projects and data pipelines. viewer.online/slp is useful for identifying, inspecting, and understanding .SLP files without installing software or dealing with compatibility problems.