A hash is a fixed-length string generated from input data using a mathematical algorithm. The same input always produces the same hash output, but even a tiny change in input produces a completely different hash. Hashes are one-way — you cannot reverse a hash to get the original data.

What is the difference between MD5, SHA1 and SHA256?

MD5 produces a 128-bit (32 character) hash and is fast but considered cryptographically broken. SHA1 produces a 160-bit (40 character) hash and is also considered weak. SHA256 produces a 256-bit (64 character) hash and is currently the most widely recommended secure hashing algorithm.

Can I use hash to verify file integrity?

Yes! Generate the hash of a downloaded file and compare it with the official checksum provided by the publisher. If they match, the file is intact and has not been tampered with. Our tool includes a checksum comparison feature for easy verification.

Which hash algorithm should I use?

For file integrity verification use SHA256 or SHA512. For password hashing use bcrypt or Argon2 (not available in browser). Avoid MD5 and SHA1 for security-critical applications as they are considered cryptographically weak.

Is my data sent to any server?

No! All hash generation runs 100% in your browser using the Web Crypto API. Your text and files never leave your device — completely secure and private.

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FAQ

What is a hash?

A hash is a fixed-length string generated from input data using a mathematical function. It's a one-way process — you cannot reverse a hash back to the original data. Used for data integrity, password storage, and digital signatures.

What's the difference between SHA-256 and SHA-512?

SHA-256 produces a 256-bit (64 character) hash, while SHA-512 produces a 512-bit (128 character) hash. SHA-512 is more secure but slightly slower. Both are widely used.

Is my data stored?

No! All hashing is done locally using the Web Crypto API in your browser. Nothing is sent anywhere.

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FAQ

What is a hash?

What's the difference between SHA-256 and SHA-512?

Is my data stored?