Key Statistics
MD5, SHA-1, SHA-256, SHA-384, SHA-512 Algorithms
Text strings or file upload Input types
Web Crypto API - never leaves device Security
Generate Hash — MD5, SHA-1, SHA-256, SHA-512
Enter text below to instantly generate its cryptographic hash. Supports MD5, SHA-1, SHA-256, SHA-384, and SHA-512 algorithms. Uses your browser's native Web Crypto API for secure, fast hashing. Your text never leaves your device—all processing is local. Perfect for password verification, file integrity checks, and checksum validation.All hashing is done locally in your browser using Web Crypto API.
Note: MD5 and SHA-1 are cryptographically broken. Use SHA-256+ for security.
What is Hash Generator?
A hash generator creates a fixed-size cryptographic fingerprint (hash) from any input data. The same input always produces the same hash, but even tiny changes create completely different hashes. This tool uses your browser's built-in Web Crypto API to generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes securely and instantly.
Used for password storage, file integrity verification, digital signatures, blockchain, checksums, and data deduplication.
How does Hash Generator work?
- 01 Enter or paste text into the input field
- 02 Select the hash algorithm (SHA-256 recommended for most uses)
- 03 View the generated hash instantly—updates as you type
- 04 Click copy to save the hash to your clipboard
- 05 Compare hashes to verify file integrity or password matches
- 06 All processing uses your browser’s Web Crypto API locally
Why use a browser-based tool?
- Maximum security: Sensitive data like passwords never leave your device
- Uses Web Crypto API: Native browser implementation, not JavaScript libraries
- Instant calculation: No network latency, results appear as you type
- Works offline: Hash text without internet after page loads
- Cryptographically secure: Same quality as server-side implementations
Common Questions
Which hash algorithm should I use?
SHA-256 is the best choice for most purposes—it's secure, widely supported, and used in Bitcoin, SSL certificates, and password hashing. Use SHA-512 for higher security margins. Avoid MD5 and SHA-1 for security applications—they're cryptographically broken but still useful for checksums.
Can hashes be reversed or decrypted?
No. Cryptographic hashes are one-way functions—you cannot mathematically reverse them to get the original input. However, weak passwords can be found via rainbow tables (precomputed hash lists). This is why passwords should be long and unique, and why proper password storage uses salted hashes.
Why do MD5 and SHA-1 say "insecure"?
MD5 and SHA-1 have known collision vulnerabilities—attackers can create different inputs with the same hash. This breaks their use for security (signatures, certificates). They're still fine for checksums and non-security uses like cache keys or file deduplication where collisions aren't exploitable.
How do I verify a file checksum?
Paste the file's text content (or use a file hashing tool) and compare the generated hash with the published checksum. If they match exactly, the file is unmodified. Software downloads often provide SHA-256 checksums to verify integrity after download.
What is the difference between hash and encryption?
Hashing is one-way (cannot be reversed) and always produces the same fixed-size output. Encryption is two-way (can decrypt with a key) and output size varies. Use hashing for verification (passwords, checksums). Use encryption for protecting data you need to access later.