Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files.
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Cryptographic hash functions transform input data into a fixed-length string of characters, known as a hash or digest. They are fundamental to modern security, used in digital signatures, password storage, data integrity verification, and blockchain technology.
This tool supports five widely-used hash algorithms: MD5 (128-bit), SHA-1 (160-bit), SHA-256 (256-bit), SHA-384 (384-bit), and SHA-512 (512-bit). SHA-256 and SHA-512 are part of the SHA-2 family defined in FIPS 180-4 and are recommended for security-critical applications.
File Integrity
Verify downloaded files match their published checksums
Password Hashing
Generate hashes for password storage and verification
Digital Signatures
Create message digests for digital signature schemes
Data Verification
Ensure data integrity during transfers and storage
What is a hash function?
A hash function is a one-way mathematical algorithm that converts input data of any size into a fixed-size string of characters. The output (hash) is unique to the input data, meaning even a small change produces a completely different hash.
Which hash algorithm should I use?
For security-sensitive applications, use SHA-256 or SHA-512. SHA-1 and MD5 are considered cryptographically broken and should only be used for non-security purposes like checksums. SHA-256 offers a good balance of security and performance.
Can I reverse a hash to get the original data?
No. Cryptographic hash functions are designed to be one-way operations. You cannot reverse a hash to recover the original input. This is what makes hashing useful for password storage and data integrity verification.
What is the difference between MD5 and SHA-256?
MD5 produces a 128-bit (32-character hex) hash and is faster but vulnerable to collision attacks. SHA-256 produces a 256-bit (64-character hex) hash and is considered cryptographically secure. Use SHA-256 for anything requiring security.
Is my data safe when using this tool?
Yes. All hashing is performed entirely in your browser using the Web Crypto API. Your data never leaves your device and is never sent to any server.
Privacy First
All hashing happens in your browser using the Web Crypto API. Your data never leaves your device.
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