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SHA256 Hash Generator
SHA256 Hash Generator
Secure Hash Algorithm 256 (256-bit)
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About the SHA256 Hash Generator
Generate the SHA-256 hash of any text. SHA-256 produces a 256-bit fingerprint shown as 64 hexadecimal characters and is widely used for integrity checks, digital signatures and blockchains.
How to use the SHA256 Hash Generator
- Enter your text.
- Press Generate SHA256 Hash, optionally choosing Uppercase Hash.
- Use Copy Hash or .TXT.
Worked example
The SHA-256 hash of "hello" is 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824.
A known value. The SHA-256 hash of hello is 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824.
When to use the SHA256 Hash Generator
- Verifying the integrity of downloads and files.
- Creating fingerprints of data for logs and audits.
- Working with blockchain and security examples.
Common mistakes to avoid
- Using a plain SHA-256 hash to store passwords. Use bcrypt, scrypt or Argon2, which are built to be slow.
- Hashing text with an extra space or a new line, which changes the output completely.
Tips
- Any tiny change in the input produces a completely different hash.
- For storing passwords, use a slow, salted algorithm such as bcrypt or Argon2, not plain SHA-256.
Frequently Asked Questions
Yes. No practical attack against SHA-256 is known, and it is used in many security systems.
256 bits, shown as 64 hexadecimal characters.
No. It is a one-way function.