Free Online Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files instantly. All hashing runs locally in your browser.
Generated Hashes
MD5
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SHA-1
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SHA-256
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SHA-512
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Key Features
Fast Processing
Hash computation runs locally in your browser for instant results using Web Crypto API.
Privacy Protected
Your text never leaves your browser. All hashing is done client-side.
Multiple Algorithms
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously in one click.
File Support
Upload files to compute hashes for integrity verification.
Frequently Asked Questions
Getting Started
When should I use MD5 instead of SHA-256?
Use MD5 only for non-security tasks: file deduplication, legacy system checksums, or cache-busting. For any security-related validation, use SHA-256 or SHA-512.
Why does SHA-512 produce a 128-character hex string?
SHA-512 produces a 512-bit (64-byte) output. Each byte is two hex characters, so 64 x 2 = 128 characters. SHA-256 produces 256 bits, yielding 64 hex characters.
Can I hash a string and reverse it to get the original input?
No. All four algorithms are one-way cryptographic hash functions. Given only the hash output, there is no mathematical operation that recovers the original input (preimage resistance).
Why would I need all four hashes at once?
Different systems require different algorithms: NPM uses SHA-512, Git uses SHA-1, legacy APIs expect MD5, and modern security standards mandate SHA-256 or SHA-512.