Hash Generator
Generate cryptographic hashes for strings and files. Create MD5, SHA1, SHA256, SHA512 hashes instantly.
Enter Text to Hash
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Max file size: 100MB • All file types supported
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Select Hash Algorithms
Choose one or more algorithms to generate hashes
MD5
128-bit hash function. Fast but cryptographically broken. Still used for checksums.
SHA-1
160-bit hash function. Deprecated for security purposes but still used in some systems.
SHA-256
256-bit hash from SHA-2 family. Currently secure and widely used (Bitcoin, TLS).
SHA-512
512-bit hash from SHA-2 family. More secure than SHA-256 but larger output.
"Hello World!"
SHA-1: 2ef7bde608ce5404e97d5f042f95f89f1c232871
SHA-256: 7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069
Empty String
SHA-1: da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA-256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Common Password
SHA-1: cbfdac6008f9cab4083784cbd1874f76618d2a97
SHA-256: ef92b778bafe771e89245b89ecbc08a44a4e166c06659911881f383d4473e94f
Security Warning
Do not use MD5 or SHA-1 for password hashing or security-sensitive applications. These algorithms are vulnerable to collision attacks.
For password storage, use dedicated password hashing algorithms like:
- bcrypt - Adaptive hash function designed for passwords
- Argon2 - Winner of the Password Hashing Competition
- PBKDF2 - Key derivation function with salt and iterations
This tool is for educational, testing, and checksum purposes only.
About Cryptographic Hashes
A cryptographic hash function takes an input (or 'message') and returns a fixed-size string of bytes. The output is typically a 'digest' that is unique to each unique input.
Properties of Cryptographic Hashes:
- Deterministic: Same input always produces same hash
- Quick Computation: Hash can be computed quickly for any input
- Pre-image Resistance: Hard to find input that produces given hash
- Small Changes, Big Difference: Changing input slightly changes hash completely
- Collision Resistance: Hard to find two different inputs with same hash
Common Use Cases:
- Data Integrity: Verify files haven't been corrupted or modified
- Digital Signatures: Sign documents and verify authenticity
- Password Storage: Store hashed passwords instead of plain text
- Blockchain: Cryptographic foundation of blockchain technology
- Checksums: Verify file downloads and data transfers
- Deduplication: Identify duplicate files or data
Algorithm Security Levels:
- Broken/Weak: MD5, SHA-1 - Should not be used for security
- Currently Secure: SHA-256, SHA-512 - Widely used and trusted
- Future-Proof: SHA-3 - Latest NIST standard
- Password-Specific: bcrypt, Argon2 - Designed for password hashing
How This Tool Works:
- Input Processing: Your input (text or file) is processed entirely in your browser
- Hash Generation: Selected hash algorithms are applied to the input
- Client-Side Only: No data is sent to any server - your data stays private
- Instant Results: Hashes are generated in real-time
- Copy & Download: Easily copy hashes or save them for later use
Note: For production security applications, always use up-to-date, well-reviewed cryptographic libraries and follow security best practices.