Hash Generator
Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) from text. Hashes update live as you type.
⚠️ MD5 and SHA-1 are not secure for passwords or sensitive data
Enter text above to generate hashes
How to Generate Hashes
- Enter or paste your text in the input field
- Select which hash algorithms you want to use
- Hashes are generated automatically as you type
- Click the copy button next to any hash to copy it to your clipboard
What are Hash Functions?
A hash function is a mathematical algorithm that converts input data of any size into a fixed-size string of characters. Hash functions are one-way: you can't reverse the hash to get the original input. They're used for data integrity, password storage, and digital signatures.
Common Use Cases
- Verify file integrity and detect tampering
- Create checksums for downloads
- Generate unique identifiers from content
- Password hashing (use SHA-256 or stronger)
- Digital signatures and certificates
- Database indexing and caching keys
Hash Algorithm Comparison
| Algorithm | Output Size | Security | Best Use |
|---|---|---|---|
| MD5 | 128 bits | ⚠️ Broken | Legacy compatibility only |
| SHA-1 | 160 bits | ⚠️ Deprecated | Legacy systems, git commits |
| SHA-256 | 256 bits | ✅ Secure | General purpose, recommended |
| SHA-512 | 512 bits | ✅ Very Secure | High security applications |
Frequently Asked Questions
Should I use MD5 or SHA-1?
For security purposes, no. MD5 and SHA-1 are cryptographically broken and should not be used for passwords or security-sensitive applications. Use SHA-256 or SHA-512 instead. MD5 is still acceptable for non-security uses like checksums or cache keys.
Can I reverse a hash?
No, hash functions are designed to be one-way. However, weak passwords can be cracked using rainbow tables or brute force. Always use strong, random passwords and add salt when hashing passwords.
Why do the hashes look random?
That's by design! Even a tiny change in the input produces a completely different hash. This property (called the avalanche effect) makes hashes useful for detecting any modification to data.