# SHA-256 Generator

Generate the SHA-256 hash of any text with this SHA-256 Generator. Enter text and the tool encodes it as UTF-8, computes the 256-bit SHA-2 digest and returns a 64 character lowercase hexadecimal string, the same value sha256sum, OpenSSL and standard libraries give. Ideal for developers and administrators who verify checksums, create content fingerprints, compare API signatures or test their own hashing code.

## Frequently asked questions

### What does the SHA-256 Generator return?

It returns the SHA-256 digest of your text as 64 lowercase hexadecimal characters, which encode 256 bits. The same text always yields the same hash.

### What is the SHA-256 hash of hello?

The lowercase word hello without a newline hashes to 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824. Comparing this value is a quick way to check that your code hashes the same bytes.

### Why does my hash differ from the one in my terminal?

Commands such as echo add a newline unless you use echo -n or printf, and that newline changes the hash. The tool hashes your text exactly as entered, without trimming spaces or line breaks.

### How are special characters and emoji handled?

All text is encoded as UTF-8 before hashing, so accented letters and emoji are hashed as their UTF-8 bytes. This matches the default in most languages, terminals and web APIs.

### Is SHA-256 secure?

Yes, SHA-256 is part of the SHA-2 family and has no known practical collision or preimage attacks. It is widely used for TLS certificates, software checksums, Git's newer object format and blockchains.

### Should I store passwords as SHA-256 hashes?

No. SHA-256 is designed to be fast, which makes guessing many passwords per second cheap. Store passwords with a slow, salted algorithm such as Argon2, bcrypt or scrypt.

### Can I hash a file with this tool?

The tool hashes text you paste or type, not uploaded files. For downloads and other binary files, use sha256sum on Linux, shasum -a 256 on macOS or Get-FileHash in PowerShell, which uses SHA-256 by default.

### Is the result an HMAC-SHA256?

No, it is a plain SHA-256 digest with no key. Webhook and API signatures usually require HMAC-SHA256 with a shared secret, which produces a different value.

### Can a SHA-256 hash be reversed?

No, there is no way to compute the text from its hash. Only guessing the input and comparing hashes works, which is feasible for short or common strings.

### How much text can I hash?

Enter at least one character and up to 5 MB of text; larger input is rejected with a message. The output matches the SHA-256 option of the Hash Generator.

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