Free SHA-256 Hash Generator
Generate SHA-256 hashes from text or files using the browser's native Web Crypto API. No libraries, no server, no upload. The most secure hash generator available client-side.
About SHA-256 Generator
SHA-256 (Secure Hash Algorithm 256-bit) is a member of the SHA-2 family of cryptographic hash functions. It produces a 256-bit (64 hex character) hash value and is considered cryptographically secure. It is used in Bitcoin, TLS certificates, Git commits, and most modern security applications.
This tool uses the browser's native crypto.subtle.digest('SHA-256', ...) API — the same engine used for HTTPS. No external libraries are needed.
Frequently Asked Questions
SHA-256 produces a 256-bit output (64 hex chars) vs MD5's 128-bit (32 hex chars). SHA-256 has no known collision vulnerabilities and is considered cryptographically secure. MD5 has known collisions and should not be used for security.
No. SHA-256 is a one-way function. Given a hash, it is computationally infeasible to determine the original input. Short or predictable inputs remain vulnerable to dictionary attacks, so always use a salt when hashing passwords.
Yes. Switch to File mode and upload any file. The tool reads the file as an ArrayBuffer and passes it directly to Web Crypto's digest function. This is equivalent to running sha256sum on the file in a terminal.