Hash Generator — MD5, SHA-1, SHA-256 & SHA-3 Online
Free online hash generator supporting MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, and SHA3-512. Generate hashes from text or files with HMAC mode and hash verification. Compare hash algorithms and verify file integrity — 100% client-side and private.
100% client-side. Your data never leaves the browser. MD5 and SHA-3 use pure JS; SHA-1/2 use the Web Crypto API.
Algorithms
Output
Verify Hash
Examples
How to Use
Enter Input
Type or paste text in the Text Input tab, or upload a file using the File Upload tab.
Select Algorithm
Choose MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, or SHA3-512.
Generate Hash
Hashes are computed instantly. Optionally enable HMAC mode and enter a secret key.
Verify or Copy
Paste an expected hash to verify, or copy the generated hash values to your clipboard.
Frequently Asked Questions
No. MD5 is broken — it has known collision attacks. Use SHA-256 for security and SHA-3 for post-quantum readiness.
HMAC is a keyed-hash message authentication code. Use it to verify both integrity and authenticity with a shared secret key.
No, hashes are one-way functions. However, unsalted hashes of common passwords can be looked up in rainbow tables.
SHA-2 (SHA-256, SHA-512) uses a Merkle-Damgård structure. SHA-3 uses a sponge construction (Keccak) with a fundamentally different design.
Yes. Switch to the File Upload tab and select any file. The hash is computed locally — your file never leaves your device.
Examples
Text Hash Example
Hello World
SHA-256 | 256-bit | Lowercase
a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e
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