Free Online Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes for any text string. All processing happens in your browser — your input never leaves your device.
Hash Algorithms Explained
MD5 (128-bit)
Produces a 32-character hex digest. Fast and widely supported, but cryptographically broken — collisions can be found in seconds. Use only for non-security purposes like file checksums or cache keys where collision resistance is not required.
SHA-1 (160-bit)
Produces a 40-character hex digest. Deprecated for security use since 2017 when a practical collision attack was demonstrated. Still commonly found in legacy systems and Git object IDs.
SHA-256 (256-bit)
Produces a 64-character hex digest. Part of the SHA-2 family and the current standard for general-purpose cryptographic hashing. Used in TLS certificates, Bitcoin, code signing, and HMAC-based authentication.
SHA-512 (512-bit)
Produces a 128-character hex digest. Offers a larger security margin than SHA-256 and can be faster than SHA-256 on 64-bit hardware. Used in high-security applications and password hashing schemes like SHA-512crypt.
Common Use Cases
- File integrity checks: Publish the SHA-256 hash of a download alongside it so users can verify the file has not been tampered with.
- Data fingerprinting: Generate a short, consistent identifier for a piece of content without storing the content itself.
- Checksum verification: Confirm that data transmitted over a network arrived without corruption.
- API signing: Create HMAC-style signatures using a secret key and a hash function to authenticate API requests.