SHA Online Encryptor
Calculate MD5, SHA1, SHA256, SHA512, SHA3, RIPEMD160 hashes online. Supports local processing for large files.
Hash Result SHA256
About Hash Algorithms
A Hash Function maps data of arbitrary size to fixed-size values. This tool runs in your browser and supports MD5, SHA-1, SHA-2, SHA-3, and other popular algorithms.
Key Features
• Local Processing: Files satisfy strict privacy as they are never uploaded to any server. • Large File Support: Supports GB-sized files via chunked processing. • Multi-Algorithm: Integrated MD5, SHA series, RIPEMD, etc. • Hex Mode: Supports Hex string input for binary data.
Supported Algorithms
MD5：Produces 128-bit hash. Very fast, common for file integrity, but not secure.
SHA-1：Produces a 160-bit (40 hex characters) hash. Deprecated for security due to collisions but useful for checksums.
SHA-256：Industry standard. Produces 256-bit hash. Used in Bitcoin and SSL.
SHA-512：Produces 512-bit hash. Often faster on 64-bit CPUs than SHA-256.
SHA-3：Next-generation standard (Keccak), structurally different from SHA-2, offering high security.
Common Use Cases
Verify the integrity of downloaded files (compare with provided checksums) Securely store passwords in databases (always use salt) Generate unique identifiers for data records or files Blockchain technology and digital signature verification Detect data corruption or tampering during transmission
Security Note
SHA-1 has been proven vulnerable to collision attacks and should not be used in security-sensitive scenarios. It is recommended to use SHA-256 or higher versions. For password storage, use dedicated password hashing algorithms such as bcrypt or Argon2.
FAQ
What is the difference between SHA-1 and SHA-256?
The main differences are hash length and security level. SHA-1 generates a 160-bit hash and is considered insecure against targeted attacks. SHA-256 generates a 256-bit hash and is considered secure for most applications, including banking and military use.
Are my files uploaded to the server?
No. This tool runs entirely in your web browser via JavaScript. Your files are processed locally on your device and never transmitted over the internet, ensuring full privacy.
Can I decrypt a SHA hash back to the original text?
No. SHA is a cryptographic hash function, not encryption. It is a one-way process. To verify data, you must hash the input again and compare the results.
Why is SHA-512 sometimes faster than SHA-256?
SHA-512 is optimized for 64-bit processors and operates on 64-bit words per round, while SHA-256 uses 32-bit words. On modern 64-bit CPUs, SHA-512 can be faster for large data.
Should I use text or Hex input mode?
For ordinary strings (like passwords or messages), use “Text”. If you have binary data represented as a hex string (e.g., “48656c6c6f”), use “Hex”. Different input byte interpretation leads to different outputs.