SHA-256 Hash Generator
Turn any text into its 64-character SHA-256 hash instantly.
How to use the SHA-256 Hash Generator
- Type or paste your text in the box.
- The SHA-256 hash appears as you type.
- Click Copy to grab the result.
About the SHA-256 Hash Generator
SHA-256 is the workhorse of the SHA-2 family, designed by the NSA and published with NIST in 2001. It processes your input in 32-bit words and produces a 256-bit digest, written as 64 hexadecimal characters. It is the default answer to "which hash should I use?" for almost everything that is not a password.
You are relying on SHA-256 constantly without noticing. It signs the TLS certificate behind the padlock in your browser. It is the proof-of-work function at the heart of Bitcoin mining, where the entire network does nothing but compute SHA-256 all day. It underpins code signing, software update verification, Linux package integrity, and HMAC message authentication in countless APIs. When a project publishes a checksum next to a download today, it is usually a SHA-256.
SHA-2 is still considered secure. Unlike SHA-1, which fell to a real collision in 2017, no practical collision or preimage attack against SHA-256 exists. Its one weakness is that it is a virtue elsewhere: it is extremely fast, which means an attacker with a stolen database can test billions of password guesses per second. For passwords, reach for a deliberately slow hash like bcrypt instead. Curiously, SHA-256 is not even the fastest option in its own family — on 64-bit CPUs, SHA-512 often beats it because it works on wider words.
Frequently asked questions
Can I decrypt or reverse a SHA-256 hash?
No. SHA-256 is one-way and the input is not recoverable from the digest — hashing destroys information rather than encoding it. Any "SHA-256 decrypter" is simply looking your hash up in a table of previously hashed common strings.
Why is a SHA-256 hash always 64 characters?
The output is always 256 bits and each hexadecimal character carries 4 bits, so every SHA-256 hash is exactly 64 characters — whether you hash a single letter or an entire film.
Is SHA-256 secure in 2026?
Yes. There is no known practical attack against SHA-256, and it remains the standard choice for signatures, certificates and integrity checks.
Can I use SHA-256 to store passwords?
You should not. It is far too fast — modern hardware can try billions of guesses per second against it. Use bcrypt or Argon2, which are intentionally slow and salted.
Is my text sent anywhere?
Your text is sent to our server to be hashed, because browsers cannot compute these hashes for you. It is hashed and immediately discarded — never logged, never stored.