SHA512 File Hash
Calculate SHA-512 or HMAC-SHA-512 for a local file or accessible URL in your browser without uploading local data. Expand to read more.
Calculate a SHA-512 file hash
This tool computes the 512-bit SHA-512 digest of a local file or accessible URL. Local files are read in the browser, and the result can be displayed as lowercase Hex, uppercase Hex, or Base64. Optional HMAC-SHA-512 supports keyed workflows.
How to hash a file with SHA-512
- Select Local File or URL as the input source.
- Choose the file or enter a URL that allows browser access.
- Select the required digest representation.
- Configure HMAC only when a trusted secret key is required.
- Calculate and compare the complete value with the expected hash.
The filename and modification time are not included; only file bytes affect the result. URL processing can be blocked by the remote server’s cross-origin policy.
Integrity and authenticity
A matching digest detects a byte difference when compared with a trusted expected value. It does not prove who published the file if both file and checksum came through the same untrusted channel.
NIST FIPS 180-4 specifies SHA-512. When authenticity is required, use a verified digital signature or a correctly designed keyed mechanism in addition to transport security.
SHA-512 file FAQ
Why is the Hex result 128 characters?
A SHA-512 digest is 64 bytes, and each byte is represented by two hexadecimal characters.
Does renaming the file change its hash?
No, unless the file contents also change.
How is this different from SHA-256?
Both belong to SHA-2, but they use different internal word sizes and output lengths. Use the algorithm specified by the system you need to match.
