Hash Checker
Verify file or text integrity by comparing hash values — detect tampering, corruption, or mismatched checksums.
About Hash Verification
Hash checking (checksum verification) is the process of computing a hash of a file or message and comparing it against a known-good hash to verify integrity. If even one byte of the data differs, the hash will be completely different — making this a reliable method to detect corruption, tampering, or transmission errors.
Software downloads, Linux ISO images, package managers (npm, pip, apt), and container registries all use cryptographic hashes to verify that files were not corrupted or tampered with. This tool lets you compute and compare hashes to verify integrity before using downloaded files or API responses.
FAQ
What does "hash mismatch" mean?
The computed hash of your input differs from the expected hash. This means either: the input was modified or corrupted, you are using the wrong algorithm, the expected hash is wrong or for a different file, or extra whitespace was included in the input.
What algorithm should I use?
SHA-256 is the current standard for integrity checking. MD5 and SHA-1 are legacy algorithms still widely used for checksums (they are not broken for integrity checking — only for security/collision resistance). Always use the same algorithm as the source that provided the expected hash.