How to generate a SM3 hash

1. 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 SM3 algorithm.

2. 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.

3. Run and copy the hash

   Press Run. The SM3 hash is computed server-side and returned as a hexadecimal string. Click Copy to grab it. SM3 is the Chinese national standard hash function, mandated in many Chinese government and financial systems. It produces a 256-bit digest.

4. 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.