Hash Generator
Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes using the Web Crypto API.
Input Text
Type text above to generate hashes
What is a Hash Generator — SHA-256, SHA-512, SHA-1?
A cryptographic hash function takes an input and produces a fixed-length string (hash) that uniquely represents the data. Even a single character change completely changes the hash output. Hashes are one-way — you cannot reverse a hash back to the original data.
Common Use Cases
Verifying file integrity after download
Storing passwords securely in databases (with salting)
Creating digital signatures and checksums
Verifying API request authenticity
Blockchain and cryptocurrency applications
Tips & Best Practices
SHA-256 is the industry standard for most security applications
SHA-512 offers stronger security but produces a longer hash
Never use MD5 or SHA-1 for security purposes — they are broken
Always add a salt when hashing passwords to prevent rainbow table attacks
Frequently Asked Questions
What is SHA-256?▼
SHA-256 is a cryptographic hash function from the SHA-2 family. It produces a 256-bit (64 character hex) hash. It is used in SSL certificates, Bitcoin, file verification, and password storage.
Can I reverse a hash back to the original text?▼
No — hash functions are one-way. You cannot reverse SHA-256 back to the original input. This is what makes them useful for password storage.
Which hash algorithm should I use?▼
Use SHA-256 for most purposes. Use SHA-512 for extra security. Never use MD5 or SHA-1 for security — they have known vulnerabilities.
Is my data sent to a server?▼
No — all hashing runs entirely in your browser using the Web Crypto API. Your data never leaves your device.