Generate MD5, SHA-1, SHA-256, SHA-512 hashes online. Compute checksums for text strings
Compare hashes
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes simultaneously.
Text — hash the entered text. All algorithms are computed simultaneously for easy comparison.
File — hash entire file. Useful for verifying checksums of downloaded files.
HMAC — hashing with a secret key (Hash-based Message Authentication Code). Used for verifying authenticity and integrity of API messages.
Hash comparison — paste two hashes to check if they match (case-insensitive).
Online Hash Generator — MD5, SHA-1, SHA-256, SHA-512, HMAC
A hash function converts arbitrary data into a fixed-length string (digest). Even a minimal change in input completely alters the result. Our generator supports text mode, file hashing, and HMAC computation with a secret key.
Hash Algorithm Comparison
| Algorithm | Length (hex) | Security | Speed | Use case |
|---|---|---|---|---|
| MD5 | 32 chars (128 bits) | Insecure (collisions) | Very fast | Checksums, caching |
| SHA-1 | 40 chars (160 bits) | Deprecated | Fast | Git, legacy systems |
| SHA-256 | 64 chars (256 bits) | Secure | Medium | SSL, blockchain, signatures |
| SHA-512 | 128 chars (512 bits) | Secure | Fast on 64-bit | Passwords, critical data |
Operating Modes
- Text — enter a string, get hashes in all algorithms simultaneously
- File — upload a file of any size, hashing runs locally with a progress bar
- HMAC — hash-based message authentication code with a secret key, used for API signing
Hash Applications
- File integrity — compare downloaded file hash with the one published by the developer
- Password storage — never store passwords in plaintext, only their hashes
- API signing — HMAC-SHA256 for request authentication between services
- Caching — content hash as a cache key (ETags, cache busting)
Frequently Asked Questions
Can a hash be decrypted?
No. Hashing is a one-way function. However, rainbow tables exist for short strings, which is why passwords use salt.
Why is MD5 considered insecure?
Practical collisions were found in 2004. MD5 is still fine for checksums but not for cryptography.
What is HMAC?
HMAC guarantees both data integrity and authenticity (that the message was created by the key owner).
Is file hashing safe online?
Yes. Files are processed locally in your browser via Web Crypto API. Nothing is uploaded.
For strong passwords use the password generator, for strength testing — password strength analyzer.
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