Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
About This Tool
Hash Generator is a free online tool that computes MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text input — instantly, in your browser, with zero data transmission. All four hashes appear simultaneously, updating in real time as you type. SHA hashes use the browser's native Web Crypto API for maximum performance and security.
Hashing is a one-way function that produces a fixed-length fingerprint of any input. The same input always produces the same hash, but it is computationally infeasible to reverse a hash back to the original input. SHA-256 and SHA-512 are widely used in security protocols (TLS, JWT, blockchain), file integrity verification, and password hashing pipelines. MD5 and SHA-1, while cryptographically weak, remain commonly used for checksums.
Hash Generator is most useful for developers verifying checksums of downloaded files, computing content hashes for cache invalidation keys, generating deterministic identifiers for strings, and experimenting with different hash algorithms for learning or testing purposes.
How to Use
- 1
Type or paste the text you want to hash into the input field.
- 2
View MD5, SHA-1, SHA-256, and SHA-512 hashes generated instantly.
- 3
Click any copy button to copy the specific hash you need.
- 4
Use the SHA-256 or SHA-512 hash for security-sensitive purposes like file checksums or HMAC keys.
- 5
Compare your generated hash against a published checksum to verify file integrity.
Features
Four Hash Algorithms
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously from a single input.
Web Crypto API
SHA hashes use the browser's native Web Crypto API for fast, secure computation.
Real-Time Hashing
Hashes update instantly as you type, so you always see the current result.
100% Local
All hashing is performed in your browser. Your text never leaves your device.
Common use cases
- ›Generate a SHA-256 hash to verify the integrity of a downloaded file against its published checksum.
- ›Compute MD5 or SHA-1 hashes for content-based cache keys or data deduplication.
- ›Generate SHA-512 hashes for cryptographic experiments, HMAC inputs, or key derivation testing.
- ›Hash user-provided strings to produce deterministic, fixed-length identifiers for databases.
Read our guide
Hash Generator — Complete Guide →FAQ
Which hash algorithm should I use?
SHA-256 is recommended for most purposes. MD5 and SHA-1 are considered weak for security but fine for checksums.
Is the hashing done locally?
Yes, SHA hashes use the Web Crypto API and MD5 runs a local implementation. Nothing leaves your browser.
What is a hash used for?
Hashes are used for file integrity verification (checksums), password storage (one-way hashing), data deduplication, digital signatures, and as inputs to HMAC or key derivation functions.
Is MD5 still safe to use?
MD5 is not safe for security purposes (collision attacks are known). It is still acceptable for non-security use cases like file checksums or data deduplication where collision resistance is not required.
Can I hash binary data with this tool?
The tool hashes text input encoded as UTF-8. For binary file hashing, you would need a dedicated tool or command-line utility like sha256sum.