dev / crypto
hash
Generate SHA-256, SHA-512, SHA-384 and SHA-1 hashes from text or a file. Uses the native Web Crypto API — zero server, nothing leaves the browser.
part of 41 free tools by vøiddo · supports 66 free tools in tools Pro
input text
or hash a file
drag a file here or click to select
SHA-256
—
SHA-512
—
SHA-384
—
SHA-1
—
verify — paste a known hash to compare
about
what is a hash?
A cryptographic hash function takes any amount of input data and produces a fixed-length fingerprint (the hash or digest). The same input always produces the same hash, but even a one-character change produces a completely different result. Hashes are one-way — you can't reconstruct the input from the output.
Common uses: verifying file downloads match their published checksum, storing passwords safely, signing API requests, and integrity checks in build pipelines.
faq
Does this hash tool send my data to a server?
No. Hashing runs entirely in your browser using the native Web Crypto API (
crypto.subtle.digest). Nothing you type or upload is transmitted anywhere.What is SHA-256 used for?
SHA-256 is used to verify file integrity (checksums), store passwords securely, sign TLS certificates, and authenticate messages in HMAC schemes. It produces a 256-bit / 64-character hex digest.
What is the difference between SHA-256 and SHA-512?
SHA-256 produces a 64-character hex digest. SHA-512 produces a 128-character digest with a larger security margin. SHA-512 is faster on 64-bit CPUs for large inputs. For most applications SHA-256 is sufficient.
Why is MD5 not listed?
MD5 is cryptographically broken — collisions have been practical since 2004, meaning two different inputs can produce the same hash. It's also not available in the browser-native Web Crypto API. Use SHA-256 or higher for any security purpose.
Can I hash a file with this tool?
Yes. Drag a file onto the drop zone or click to select one. The tool reads the file as binary and produces the same hash you'd get from
sha256sum filename or openssl dgst -sha256 filename on the command line.What does the verify field do?
Paste any known hash into the Verify field. The tool compares it against all four computed hashes and shows a green match or red mismatch instantly. Useful for checking file checksums against published values.