What is a cryptographic hash?

A cryptographic hash is a fixed-length string produced from any input. The same input always produces the same hash. Even a tiny change in the input produces a completely different hash. Hashes are one-way — you cannot reverse them to get the original input.

MD5 is no longer suitable for passwords or security applications, but remains useful for non-security purposes like checksums, file deduplication, and cache keys where collision resistance is not required.

#️⃣ MD5 · SHA-1 · SHA-256 · SHA-512 · Browser-Only

Hash Generator

Hash any text with MD5, SHA-1, SHA-256, or SHA-512. Instant, real-time results — nothing ever leaves your browser.

Security note: MD5 and SHA-1 are cryptographically broken and should not be used for security purposes (passwords, signatures). Use SHA-256 or SHA-512 for anything security-sensitive.

0 characters · 0 bytes Real-time hashing

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MD5 128-bit · 32 hex chars

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SHA-1 160-bit · 40 hex chars

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SHA-256 256-bit · 64 hex chars

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SHA-512 512-bit · 128 hex chars

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Uppercase output

🔒 Use SHA-256 for Security

SHA-256 is the current gold standard for checksums, file verification, and data integrity. Part of the SHA-2 family, it's used in TLS, Bitcoin, and code signing.

⚠️ MD5 is Broken

MD5 was widely used but collision attacks were demonstrated in 2004. It's fine for non-security checksums (e.g. CDN cache busting) but never for passwords or signatures.

🧠 Hashes are One-Way

Hashing is deterministic (same input always produces the same output) but irreversible. You cannot reconstruct the original input from a hash alone.

Hash Generator — FAQ

Can I use this to hash passwords?

No — never use MD5 or SHA-256 directly to hash passwords. Use a purpose-built password hashing algorithm like bcrypt, Argon2, or scrypt instead. These add salting and are intentionally slow, making brute-force attacks impractical.

What's the difference between MD5 and SHA-256?

MD5 produces a 128-bit hash (32 hex characters) and is broken — practical collisions are possible. SHA-256 produces a 256-bit hash (64 hex characters) and remains secure. For any security use, always choose SHA-256 or higher.

What's SHA-512 used for?

SHA-512 is preferred when extra security margin matters or when you're hashing on 64-bit hardware (where it can actually be faster than SHA-256). It's common in TLS certificates, software signing, and high-security storage systems.

Is this tool safe to use with sensitive data?

Everything runs entirely in your browser using the Web Crypto API. Nothing is transmitted anywhere. However, for highly sensitive data, you may prefer to use a local CLI tool like openssl dgst or sha256sum.