Free Hash Generator Online
Generate MD5, SHA-1, SHA-256 and SHA-512 cryptographic hashes of any text. All hashing happens in your browser — your data never leaves your device.
About the Hash Generator
This free online hash generator computes cryptographic hashes using the browser's native Web Crypto API for SHA-1, SHA-256 and SHA-512. MD5 is computed via a pure-JavaScript implementation since it is not included in the Web Crypto standard. All computation happens locally — no text is ever sent to a server.
Common uses for hash generation include verifying file integrity (checksums), storing password digests in databases, generating API request signatures, and creating content-addressable identifiers for data deduplication.
SHA-256 is recommended for most modern use cases. MD5 and SHA-1 are provided for compatibility with legacy systems but should not be used for new security-sensitive applications.
How to Generate a Hash
Enter Text
Type or paste the text you want to hash into the input area. You can also click "Load Sample" to see example output.
Choose Options
Select lowercase or UPPERCASE output. Enable "Auto-hash on type" to see hashes update in real time.
Generate
Click "Generate Hashes" to compute all four hash algorithms simultaneously.
Copy
Click the "Copy" button next to any hash to copy it to your clipboard instantly.
Key Features
- Generates MD5, SHA-1, SHA-256 and SHA-512 simultaneously
- SHA-1/SHA-256/SHA-512 use the native Web Crypto API
- Toggle between lowercase and UPPERCASE hex output
- Auto-hash mode updates results as you type
- One-click copy for each individual hash
- Character counter for input text
- Zero server communication — 100% offline-capable
Frequently Asked Questions
A cryptographic hash function takes any input and produces a fixed-length string (the hash). The same input always produces the same hash, but even a single-character change produces a completely different hash. Hashes are one-way — you cannot recover the original text from the hash alone.
For security-sensitive applications use SHA-256 or SHA-512. MD5 and SHA-1 are considered cryptographically broken for collision resistance but remain useful for non-security checksums and file integrity verification where collision attacks are not a concern.
MD5 is not safe for password hashing or digital signatures due to known collision vulnerabilities. However it is still widely used for non-cryptographic checksums such as verifying downloaded files, where collisions are not an attack vector.
This tool currently hashes text input. For file hashing, paste the file's text content into the input area. A dedicated file hash checker supporting binary files is planned for a future release.