Important Notes
Hash calculation time depends on file size. Large files may take longer to process, so keep the page open until the result appears.
About the SHA-256 File Checksum Generator
The SHA-256 File Checksum Generator calculates the SHA-256 hash of a selected file. Use it to create a SHA256 checksum for download verification, file comparison, backup checks, or detecting unexpected file changes.
SHA-256, short for Secure Hash Algorithm 256-bit, is part of the SHA-2 family of hash functions. It produces a fixed 256-bit digest, usually shown as a 64-character hexadecimal checksum. The same file should produce the same SHA-256 checksum, while a changed file should produce a different hash.
This page is for file checksums, not typed text. Select a file, generate its SHA-256 checksum, then compare the result with a trusted checksum from a software publisher, download page, or another reliable source.
• Features
File-Based Checksum: Generate a SHA-256 checksum from a selected file.
256-Bit Output: SHA-256 produces a 256-bit hash, commonly displayed as a 64-character hexadecimal string.
Change Detection: A small change to the file should produce a different SHA-256 checksum.
One-Way Hashing: A SHA-256 checksum cannot be used to rebuild or reveal the original file.
Easy Comparison: Copy the generated SHA256 hash and compare it with another checksum value.
Widely Supported: SHA-256 is commonly supported by operating systems, command-line tools, programming languages, and software publishers.
• Use Cases
Download Verification: Compare the SHA-256 checksum of a downloaded file with the value published by a trusted source.
File Integrity Check: Confirm whether a file stayed the same after copying, uploading, transferring, or backing it up.
File Comparison: Use the SHA-256 hash as a compact fingerprint for comparing file contents.
Software Package Checks: Verify installers, archives, release packages, ISO files, backups, and shared files when a SHA256 checksum is provided.
• SHA-256 vs. Older Checksums
MD5 and SHA-1 still appear in older checksum lists, but SHA-256 is usually preferred for modern file verification when a SHA-256 value is available. It offers a stronger hash than MD5 or SHA-1 while remaining practical and widely supported.
• How to Use a SHA-256 File Checksum
Choose the file you want to check, generate its SHA-256 checksum, and compare the result with the expected SHA256 value. A matching checksum means the file matches that expected value. A different checksum means the file content is not the same and should be checked again.
Security Note: SHA-256 is a hash function, not encryption. This tool calculates a file checksum; it does not encrypt, decrypt, or hide file contents. SHA-256 should also not be used by itself for password storage.