.SHA1 File Extension

SHA-1 Hash File

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What is an SHA1 file?

An SHA1 file contains an SHA-1 hash created by sha1sum (or another SHA-1 hash generation program). The hash consists of a unique series of numbers and letters generated using the Secure Hash Algorithm 1 (SHA-1) hash function. SHA1 files are used to verify files' integrity.

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Screenshot of a .sha1 file in Microsoft Visual Studio Code
SHA1 file open in Microsoft Visual Studio Code

When hosting a file for download, users sometimes also provide an accompanying SHA1 file. This file contains a hash that can be used to verify the downloaded file has not been corrupted or tampered with during the download process.

After downloading a file that comes with a corresponding SHA1 file, you should run the file through sha1sum to generate a hash. (Sha1sum is installed by default on most Linux distributions and also available for macOS and Windows.) If sha1sum produces the same hash stored in your SHA1 file, the downloaded file's integrity is intact, and it is likely safe to use.

How to open an SHA1 file

You can open an SHA1 file with Microsoft Notepad (Windows), Apple TextEdit (Mac), Vim (Linux), or any other text editor, to view the hash it contains.

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Programs that open or reference SHA1 files

Included with OS
Included with OS

Verified by FileInfo.com

The FileInfo.com team has independently researched the SHA-1 Hash file format and Mac, Windows, and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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