SHA256 Hash Generator

PRIVATE/Runs in your browser. Files are never uploaded.

SHA256 Hash is a tool that allow you to generate SHA256 hashes from string. One of the most widely used hash algorithms is the secure hash algorithm with a digest size of 256 bits, also known as the SHA 256 algorithm. SHA 256 has remained at the forefront of real-world applications, despite the existence of alternative variations.

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Free SHA256 Hash Generator Online

Generating a SHA256 hash

This tool computes the SHA256 hash of whatever you type or paste. A hash is a fixed-length string (64 characters) derived from the content, and it changes completely if the input changes even by one character.

SHA256 belongs to the SHA-2 family and is currently considered sound. It is the common choice for signatures, checksums and integrity proofs.

How to use it

Paste your text into the input field. The SHA256 value is computed and can then be copied.

Watch out for stray spaces or a trailing newline: they count as part of the input and will produce a different value.

What hashes are used for

For verifying downloaded files: many vendors publish a SHA256 value you can compare your own copy against.

It is also the usual basis for digital signatures and for content identifiers in distributed systems.

What hashes do not do

A hash only proves that content is unchanged, not where it came from. Provenance additionally requires a signature.

SHA256 on its own is not suitable for storing passwords either, because it computes too quickly for that purpose.

Frequently asked questions

Can the original text be recovered from a SHA256 value?

No. Hashing is one-way: it derives a value from the input, not the other way round. Short or very common inputs can still be guessed by trial and error, however.

Why does the same input always give the same value?

That is intentional. Identical input always yields an identical hash, and that property is exactly what makes hashes useful for comparing two pieces of content.

Does my input leave the device?

Processing runs in the browser. Even so, avoid pasting confidential material if you would rather it were not processed at all.