Hash Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes from text. Everything runs in your browser — nothing is sent to any server.

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FAQ

Password Storage File Integrity Digital Signatures Checksum
What's the difference between hashing and encryption?
Hashing is one-way—you cannot reverse it. Encryption can be decrypted. Passwords are stored as hashes; even if leaked, the original password is hard to recover.
Is MD5 still safe to use?
MD5 is broken and should not be used for passwords. It's still fine for file checksums. For secure hashing, use SHA-256 or stronger.
SHA-1, SHA-256, or SHA-512—which should I use?
SHA-256 is the most common choice—good balance of security and speed. SHA-512 is more secure but slower. SHA-1 is deprecated and not recommended.
Why does the same content always produce the same hash?
That's by design. The same input always produces the same output, and different inputs almost always produce different outputs. Perfect for verifying data integrity.
Can I hash multiple files at once?
Yes, process multiple files simultaneously, each with its own hash value. Great for batch file verification.
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How Hashes Are Used in Real Projects

A hash function turns input data into a fixed-length fingerprint. If even one character changes, the hash changes completely. That makes hashes useful for checking file integrity, comparing data without storing the original value, verifying downloads, and detecting accidental changes in configuration or logs.

For security-sensitive work, choose the algorithm carefully. SHA-256 is a practical default for general integrity checks and signatures. SHA-512 is also strong, especially on 64-bit systems. SHA-1 is included because older systems still expose it, but it should not be used for new security decisions. MD5 is intentionally not the default here because it is no longer collision-resistant.

Hashing Is Not Enough for Password Storage

A plain SHA-256 hash is not a complete password storage strategy. Real password systems should use a unique salt and a password hashing algorithm such as Argon2, bcrypt, scrypt, or PBKDF2. Those algorithms are designed to slow down guessing attacks. A fast hash is useful for integrity checks, but speed becomes a weakness when attackers can try billions of password guesses.

Use this tool to understand and compare hash output, verify small test strings, or generate checksums for non-secret content. Do not paste production secrets, private keys, or user passwords into any online tool, even one that runs locally in the browser.

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