📖 Description

In scenarios involving sensitive information processing and domestic substitution, SM3 is the statutory hash standard:

Compliance & Access: It complies with the standards of the State Cryptography Administration and is a mandatory requirement for government systems and financial institutions (e.g., electronic banking, payment systems) to pass Level 3 and above security evaluations.
Security Advantage: Compared to MD5 and SHA-1, SM3 offers higher collision resistance. Its generated 256-bit (32-byte) digest length is sufficient to withstand most current cryptanalysis attacks.
Core of Digital Signatures: SM3 is often used in conjunction with the [SM2 algorithm] as a preprocessing step in digital signature schemes, ensuring the uniqueness and integrity of the data to be signed.

This site's tool provides an industrial-grade SM3 calculation experience, ensuring authoritative results:

Strictly adheres to the GM/T 32905-2016 specification from the State Cryptography Administration. Calculation results are completely consistent with GmSSL, OpenSSL's SM version, and mainstream Java/C# cryptographic libraries.

Text (String) Mode: Quickly calculate the SM3 value of strings, phrases, or code snippets.
Hexadecimal (Hex) Mode: Supports input of raw byte streams (e.g., certificate data, message binaries), facilitating developers in performing fingerprint comparisons at the protocol level.

Core Security: All SM3 hash computations are performed locally in your browser (Client-side).
Zero Data Upload: Your original data (whether passwords, contract drafts, or system parameters) is never uploaded to the server. The tool can still function normally even offline (as long as the page is loaded).

Scenario	Recommended Operation	Application Value
Database Password Storage	Plaintext password + salt -> SM3	A password encryption scheme compliant with domestic security and regulatory requirements.
Electronic Invoice Verification	Core invoice metadata -> SM3	Verifies whether electronic invoices have been tampered with during transmission.
Firmware Integrity Check	Original firmware Hex data -> SM3	Ensures the security and reliability of system upgrade packages for domestic devices.
SM2 Signature Preprocessing	Message to be signed -> SM3	Obtains the message digest for subsequent SM2 digital signatures.

Input Original Text: Paste the text or Hex byte sequence to be calculated into the input box.
Get Results Instantly: As you type, the 64-character hexadecimal string result (i.e., the 256-bit digest) will be displayed immediately below.
Format Adjustment: You can switch the result to uppercase or lowercase with one click according to your code conventions.
One-Click Copy: Click the icon to quickly save the SM3 hash value.

Developer-Friendly: Extremely fast interface response, supports processing of very long text, with no pop-up interference.
Multi-Language Interoperability: Adapts to standard padding mechanisms, ensuring generated hash values can be verified in backend environments like Python, PHP, Go, etc.
Completely Free: No functional limitations. It's an efficiency tool for developers working on cryptographic integration and debugging.

SM3 Encryption