HMAC calculator
HMAC calculator lets you calculate HMAC-SHA-256, 384, or 512 without storing the key in your browser.
SHA hash calculator
SHA hash calculator lets you calculate SHA-256, SHA-384, or SHA-512 for text and files in your browser.
SHA hash calculator
⌂ Inputs and results stay in this browser and are not automatically stored or sent.
Waiting for input
Input and conditions
Text uses UTF-8, including line endings. Files use their raw bytes.
No automatic copying or saving. Take care on shared devices and with clipboard contents.
Output
Waiting for input
Complete text result
How to use
Select text or file input and the same SHA algorithm used by the reference hash.
Character encoding and trailing newlines change the digest. A match alone does not authenticate the publisher; check how you obtained the reference hash. This tool does not decrypt ciphertext.
Examples
abcPrinciples and limits
Each input is limited to 1,048,576 bytes, output to 33,554,432 bytes, and processing to 5,000 ms. Input is never silently truncated.
Guides
Related tools
CRC32 checksum
CRC32 checksum lets you calculate CRC-32/ISO-HDLC checksums for text and files in your browser.