SHA-256 Hash Generator - Create Secure Hashes Online

Generate SHA-256 hashes from text or files in your browser. Secure 256-bit checksums using Web Crypto API. Fast, private, no server uploads required.

Text to Hash

Drop file here or click to select

Any file type supported

SHA-256 Hash (64 characters)

lowercase

UPPERCASE

Copied to clipboard

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Frequently Asked Questions

SHA-256 is part of the SHA-2 family of cryptographic hash functions. It produces a 256-bit (64 hex character) hash and is widely used for security, including Bitcoin and SSL certificates.

Yes. SHA-256 is currently considered cryptographically secure. It's approved by NIST and used in many security-critical applications.

Yes. This tool uses the Web Crypto API built into your browser. All hashing happens locally - no data is ever sent to any server.

SHA-256 is much more secure than MD5. It produces a longer hash (256 bits vs 128 bits) and has no known practical collision attacks, unlike MD5.

Yes. SHA-256 is excellent for file verification. Compare the hash of your downloaded file with the expected hash to ensure it wasn't corrupted or tampered with.

Both are secure. SHA-256 is more common and sufficient for most uses. SHA-512 offers a larger security margin and may be faster on 64-bit systems, but produces longer hashes.

Yes. Bitcoin uses SHA-256 for proof-of-work mining and for creating transaction and block hashes. The security of the entire Bitcoin network relies on SHA-256's collision resistance.

Not with current technology. A brute-force attack would require 2^256 attempts - astronomically more than is computationally feasible. Quantum computers may eventually threaten this, but not in the foreseeable future.

SHA-2 is the family name; SHA-256 is one member of that family (along with SHA-224, SHA-384, SHA-512). SHA-256 refers specifically to the 256-bit output variant.

Hashes must match exactly, character for character. Even one different character means different content. You can copy both hashes into a text editor and use uppercase/lowercase formatting to make comparison easier.

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