Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text.
Type or paste any text and get its MD5, SHA-1, SHA-256 and SHA-512 hash values all at once. Hashes are used for verifying file integrity, generating checksums and checking data consistency. Everything runs in your browser - your input never leaves your machine.
Hash Algorithms Compared
- MD5 - Produces a 128-bit (32 character) hash. It's fast but cryptographically broken since 2004. Researchers can generate collisions (two different inputs with the same hash) in seconds. Still fine for non-security stuff like cache keys or quick checksums.
- SHA-1 - Produces a 160-bit (40 character) hash. Google demonstrated a practical SHA-1 collision in 2017 (the SHAttered attack). Major browsers stopped trusting SHA-1 SSL certificates back in 2017. Don't use it for anything security-related.
- SHA-256 - Produces a 256-bit (64 character) hash. This is the current workhorse. Bitcoin uses it. SSL/TLS certificates use it. Git uses it in newer versions. No known practical attacks exist against SHA-256.
- SHA-512 - Produces a 512-bit (128 character) hash. Stronger than SHA-256 with longer output. Actually runs faster than SHA-256 on 64-bit processors. Used when you need the highest level of integrity checking.
Hashing vs. Encryption
People mix these up all the time. Hashing is one-way. You can't reverse a hash to get back the original text. That's by design. Encryption is two-way. You encrypt data with a key and decrypt it with the same key (or a related key). Use hashes for integrity checks. For passwords, use a purpose-built password hashing method. Use encryption when you need to get the original data back.
The Avalanche Effect
Change a single character in your input and the hash output changes completely. Try it. Hash "hello" and then hash "Hello" (capital H). The two hashes will look nothing alike. This property makes hashes great for detecting even tiny changes in data.
Don't Use These for Passwords
MD5 and SHA-256 are too fast for password hashing. An attacker with a modern GPU can try billions of SHA-256 hashes per second. For passwords, use purpose-built algorithms like bcrypt, scrypt or Argon2id. These are intentionally slow and include built-in salt handling.
How to Use
- Enter or paste your text in the input area.
- All four hash values (MD5, SHA-1, SHA-256, SHA-512) appear instantly.
- Click the copy button next to the hash you need.
Frequently Asked Questions
How do I use the Hash Generator?
Paste text and the tool generates common hashes such as MD5, SHA-1 and SHA-256. Copy the hash your system needs. Use it for checksums, quick comparisons and integrity checks.
Can a hash be reversed?
No. A hash is designed to be one-way. You can compare a hash with another hash, but you cannot safely turn it back into the original text.
Which hash should I use?
Use SHA-256 for general integrity checks. Avoid MD5 and SHA-1 for security work because they are no longer safe choices. Use the algorithm your system or API requires.
Can I use this for passwords?
Do not use a plain hash for real password storage. Passwords need a slow password hashing method with a salt. Examples include bcrypt, scrypt and Argon2.
Why does one small change create a totally different hash?
Good hash functions are designed that way. A tiny change should produce a very different result. This makes hashes useful for checking whether content changed.