Something wrong with this tool?
About SHA-3-256 Hash Generator Online
SHA-3-256 is based on the Keccak sponge construction — an entirely different algorithm from SHA-2, providing an independent security foundation at the same 256-bit output size. It is the recommended choice when you need SHA-3's structural resistance to differential cryptanalysis.
Use this tool to quickly compute a SHA-3-256 hash for any text string. Enter your input, run the tool, and copy the hexadecimal digest. You can switch between lower-case and upper-case hex output to match the convention expected by your system.
How to use this tool
How to generate a SHA-3-256 hash
Enter your text
Paste or type any plain text into the Text field — up to 200,000 characters. This is the string that will be hashed using the SHA-3-256 algorithm.
Choose hex case
Select lower case (a–f, the default) or UPPER CASE (A–F) for the hexadecimal output. Both are valid — choose based on what your downstream system expects.
Run and copy the hash
Press Run. The SHA-3-256 hash is computed server-side and returned as a hexadecimal string. Click Copy to grab it. SHA-3-256 is based on the Keccak sponge construction — a completely different design from SHA-2, offering an independent security foundation at the same output size.
Verify or compare
To verify a file's integrity, hash it as text and compare the output to the published checksum. To check two strings are equal without revealing the originals, hash both and compare the digests — identical digests mean identical inputs.