SHA-256 Hash Generator
Cryptography & SecuritySHA-256 Hash Generator
Drag & drop a file here, or click to select
How to Use This Calculator
How to Use the SHA-256 Hash Generator
The SHA-256 Hash Generator produces a 256-bit (64-character hexadecimal) cryptographic hash from any text or file. SHA-256 is part of the SHA-2 family designed by the NSA and is widely used in SSL/TLS certificates, Bitcoin mining, and data integrity verification.
Text Hashing
Type or paste text into the input area and click Generate. The hash is computed entirely in your browser using the Web Crypto API, ensuring your data stays private. Even a single character change in the input produces a completely different hash output.
File Hashing
Drag and drop a file or click the drop zone to select one. The file is read locally and hashed using the browser's native SHA-256 implementation, which is hardware-accelerated on modern devices for fast performance even on large files.
Why SHA-256?
SHA-256 is the current gold standard for cryptographic hashing. It provides strong collision resistance, meaning it is computationally infeasible to find two different inputs that produce the same hash. It is used in Bitcoin's proof-of-work algorithm, digital certificates, and secure password storage.
Frequently Asked Questions
Q: Is SHA-256 secure?
A: Yes, SHA-256 is considered cryptographically secure. No practical collision attacks have been found, and it is recommended by NIST for security applications.
Q: How long is a SHA-256 hash?
A: A SHA-256 hash is always 256 bits, displayed as a 64-character hexadecimal string.
Q: What is the difference between SHA-256 and SHA-512?
A: SHA-256 produces a 256-bit hash while SHA-512 produces a 512-bit hash. SHA-512 can be faster on 64-bit processors but both provide excellent security.