Important Notes
File size can affect the speed of hash value calculation. Please be patient.
About the SHA-256 File Checksum Tool
The SHA-256 File Checksum Tool calculates the SHA-256 hash value of a file. You can use it to generate a SHA256 checksum, compare it with a published checksum, and check whether a file is consistent, fully downloaded, or unexpectedly changed.
SHA-256, short for Secure Hash Algorithm 256-bit, is a hash function in the SHA-2 family. It is not file encryption and it does not hide, lock, or decrypt file contents. Instead, SHA-256 creates a fixed 256-bit hash value, usually displayed as a 64-character hexadecimal checksum. The same file should produce the same SHA-256 checksum, while even a small change to the file will usually produce a different hash value.
This page is designed for file checksum checks, not text hashing. If you are searching for terms like “SHA256 file encryption” or “SHA-256 encrypt file,” keep in mind that SHA-256 is a one-way hash function, not an encryption method. It is useful for verifying file integrity, but it cannot be used to recover the original file from the hash.
• Features
File-Based SHA-256 Checksum: Generate a SHA-256 checksum from a file and get a SHA256 file hash value for comparison.
256-Bit Output: SHA-256 produces a 256-bit hash value, commonly shown as a 64-character hexadecimal string.
File Integrity Check: Compare the generated checksum with an expected SHA-256 value to see whether a file matches, changed, or may have been corrupted.
Download Verification: Check installers, archives, documents, images, ISO files, and other downloads against a published SHA256 checksum.
One-Way Hash Function: SHA-256 does not encrypt files. It creates a one-way hash value that helps identify changes in file content.
Broad Compatibility: SHA-256 is widely supported by operating systems, command-line tools, programming languages, and security software.
Modern Checksum Choice: For many common file verification tasks, SHA-256 is generally a better choice than older checksum algorithms such as MD5 or SHA-1 when a SHA-256 value is available.
• Use Cases
Verify Downloaded Files: After downloading a file, calculate its SHA-256 checksum and compare it with the checksum provided by the publisher to check whether the download completed correctly.
Check File Consistency: Generate a SHA256 file hash before and after copying, uploading, or transferring a file to confirm that the file content stayed the same.
Detect Unexpected Changes: Use SHA-256 checksums to notice accidental edits, corruption, or mismatches between two file versions.
Compare Files Safely: If two files produce the same expected SHA-256 checksum, they are very likely to have the same content. If the checksum is different, the file content is different.
Software and Package Verification: Developers and users often use SHA-256 checksums to verify installers, release packages, backups, and shared files.
Avoid Password Storage Misuse: SHA-256 is fast and useful for file integrity checks, but it should not be used by itself for password storage. Passwords should be stored with dedicated password-hashing algorithms designed for that purpose.
• SHA-256 vs. MD5 and SHA-1 for File Checksums
MD5 and SHA-1 are still seen in older checksum lists, but SHA-256 is usually preferred for modern file verification when available. It provides a stronger hash than MD5 or SHA-1 while remaining widely supported and practical for checking whether files match.
• How to Use a SHA-256 File Checksum
First, choose the file you want to check. Then generate its SHA-256 checksum with this tool. If you have an expected SHA256 checksum from a download page, software publisher, or another trusted source, compare both values carefully. A matching checksum means the file is consistent with that expected value. A different checksum means the file is not the same and should be checked again.