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 SHA3-256 File Checksum Calculator
This SHA3-256 file checksum calculator generates a SHA3-256 hash from a selected file. Use it to verify file integrity, compare files, or check whether a downloaded file matches a checksum published by a website, developer, or software provider.
SHA3-256 is a cryptographic hash function in the SHA-3 family. It creates a fixed 256-bit digest, commonly displayed as a 64-character hexadecimal checksum.
SHA3-256 is different from SHA-256 and SHA2-256. SHA-256 belongs to the SHA-2 family, while SHA3-256 belongs to the SHA-3 family and is based on Keccak. The names are similar, but the algorithms are different and will produce different hash values for the same file.
SHA3-256 is a one-way hash function, not encryption. It does not hide file contents, cannot decrypt files, and should not be used as a password storage method.
• Features
File SHA3-256 Hash: Select a file and generate its SHA3-256 checksum.
64-Character Hex Output: View the SHA3-256 result as a fixed-length hexadecimal hash.
Lowercase and Uppercase Results: Copy the SHA3-256 hash in either lowercase or uppercase format.
File Integrity Check: Compare the generated checksum with a known SHA3-256 value to see whether a file has changed.
Download Verification: Check a downloaded file against a SHA3-256 checksum provided by the original source.
SHA-3 Algorithm: Use SHA3-256, a SHA-3 family algorithm that is separate from SHA-256 and other SHA-2 variants.
Browser-Based Processing: The file is processed in your browser, but you should still avoid using online tools for highly sensitive files.
• Use Cases
Verify Downloads: Compare a local file with a published SHA3-256 checksum before opening, installing, or sharing it.
Compare File Copies: Generate SHA3-256 hashes for two files to help confirm whether their contents match.
Detect File Changes: Recalculate a checksum later to check whether a file has been modified.
Software Release Checks: Use SHA3-256 checksums as part of a release or distribution verification workflow.
File Fingerprinting: Keep a SHA3-256 hash as a compact reference value for later file comparison.