What is a SHA1 file?
A .SHA1 file usually contains a SHA-1 checksum hash. This is a short text string used to verify file integrity. When you download a large file, the provider often includes a .SHA1 file. By calculating the hash of the downloaded file and comparing it to the text inside the .SHA1 file, you can ensure the download is complete and unmodified.
Alternatively, a .SHA1 file can be a game asset video file. The video game F.E.A.R. by Monolith Productions uses the .SHA1 extension to store video assets. In this case, the file is actually a RIFF encoded AVI video file.
How to open SHA1 files?
You can open standard checksum .SHA1 files with any text editor, such as Notepad on Windows or TextEdit on macOS. To actually verify the checksum, you must use a command-line tool like `sha1sum` on Linux or `CertUtil` on Windows. You can also use graphical software like MultiHasher.
If the file is a game video asset, standard text editors will display random, unreadable characters. Instead, you can play this type of .SHA1 file using VLC media player.
Best practices and troubleshooting
Because .SHA1 has multiple possible meanings, it can be confusing to know exactly what your file is. viewer.online/sha1 can analyze .SHA1 files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
viewer.online/sha1 is useful for identifying, inspecting, and understanding .SHA1 files without installing software or dealing with compatibility problems. It removes the guesswork from handling unknown files, keeping your system clean and secure.