cSHAKE256 File
Compute the cSHAKE256 hash of any file. Streams the file in 64-byte output mode (same as SHAKE256).
Calculate the cSHAKE256 hash of a file. Free, offline, runs entirely in your browser. Read more Show less
What is cSHAKE256 file hashing?
cSHAKE256 is the customizable XOF from NIST SP 800-185. With default parameters (no function name, no personalization) it matches SHAKE256 at 512 bits of output, which is what this tool produces. For custom function names or personalization strings, use the text-based cSHAKE256 tool.
How to use
Drag a file into the box, click to select one, or paste from the clipboard. The tool streams the file in chunks and computes the hash as it reads. You can also enter a file URL; the server must allow cross-origin requests.
FAQ
Are my files uploaded anywhere?
No. The file never leaves your device.
How large a file can I hash?
Any size your browser can open. cSHAKE256 is streamed in chunks, so memory use stays flat.
Why does my hash differ from another tool?
Confirm the file is byte-identical and the other tool is reading it in binary mode. Text modes can alter line endings.
Command line equivalent
# Node with hash-wasm
node --input-type=module -e "import { cshake256 } from 'hash-wasm'; import fs from 'fs'; const b = fs.readFileSync('myfile.bin'); console.log(await cshake256(b, 512, '', ''));"The server must allow cross-origin requests (CORS). If it doesn't, download the file and use the File tab.