SHA-256 Hash Generator
This SHA-256 generator produces 256-bit digests from text or files without sending data anywhere. SHA-256 is selected when the page loads, so pasting text immediately shows the 64-character hex hash; you can also enable HMAC mode with a secret key, switch to uppercase output, or hash a whole file. SHA-256 is the current baseline for integrity and authentication: it secures TLS certificates, code-signing pipelines, package managers, Bitcoin, and JWT signatures. HMAC-SHA-256 is the standard choice when a shared secret must authenticate a message. Everything runs in JavaScript on your device, so even private keys and tokens never leave the browser. Copy or download the digest with one click.
No saved hashes yet, generate a hash then click Save
How to use this tool
Overview
This SHA-256 generator produces 256-bit digests from text or files without sending data anywhere. SHA-256 is selected when the page loads, so pasting text immediately shows the 64-character hex hash; you can also enable HMAC mode with a secret key, switch to uppercase output, or hash a whole file. SHA-256 is the current baseline for integrity and authentication: it secures TLS certificates, code-signing pipelines, package managers, Bitcoin, and JWT signatures. HMAC-SHA-256 is the standard choice when a shared secret must authenticate a message. Everything runs in JavaScript on your device, so even private keys and tokens never leave the browser. Copy or download the digest with one click.Formula
SHA-256: 256-bit hash value (64 hex characters)Frequently asked questions
Why choose SHA-256? +
SHA-256 is the current baseline for integrity and authentication: it is collision-resistant, part of the SHA-2 standard, and used in TLS, code signing, package managers, and HMAC/JWT flows.
How long is a SHA-256 hash? +
256 bits, displayed as 64 hexadecimal characters. Even a one-character change to the input produces a completely different digest.
Is SHA-256 the same as SHA-2? +
SHA-256 is one member of the SHA-2 family, which also includes SHA-224, SHA-384, SHA-512, and SHA-512/256. Saying SHA-2 alone does not specify which variant is meant.
What hash algorithms does the tool support? +
This tool supports MD5, SHA-1, SHA-256, SHA-384, SHA-512, and other common cryptographic hash functions.
Can I hash files as well as text? +
Yes. Paste text directly or upload a file and the tool generates the hash for the content.
Are hashes generated in the browser? +
Yes. All hashing happens locally in your browser. Your data is never sent to any server.
What is the difference between MD5 and SHA-256? +
MD5 produces a 128-bit hash and is considered cryptographically broken. SHA-256 produces a 256-bit hash and is currently secure. Use SHA-256 for security purposes.