MD5/SHA Hash Generator & Checker
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text, or verify a hash against input text. Perfect for file integrity checks, checksums, and hash comparison. All hashing happens in your browser.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text, or verify a hash against input text. This free hash generator and checker is perfect for verifying file integrity, creating checksums, and comparing hash values. All hashing happens entirely in your browser using the Web Crypto API and a pure JavaScript MD5 implementation — your data is never sent to any server.
100% Client-Side Processing
All hashing happens directly in your browser using the Web Crypto API (SHA) and a pure JavaScript implementation (MD5). Your data never leaves your device.
How to Use the Hash Generator & Checker
- Choose your mode: "Generate" creates a hash from text, "Verify" checks if text matches an expected hash.
- In Generate mode: Select an algorithm (MD5, SHA-1, SHA-256, SHA-512), type or paste text, and see the hash instantly.
- In Verify mode: Enter the text in the left panel and paste the expected hash in the right panel. The algorithm is detected automatically from hash length.
- Copy the result using the "Copy Hash" button.
Hash Algorithm Reference
| Algorithm | Output Length | Security | Use Case |
|---|---|---|---|
| MD5 | 128 bits (32 hex) | Broken | Checksums only |
| SHA-1 | 160 bits (40 hex) | Deprecated | Legacy systems |
| SHA-256 | 256 bits (64 hex) | Secure | General purpose |
| SHA-512 | 512 bits (128 hex) | Secure | High security |
Common Use Cases
File Integrity
Verify downloaded files match expected checksums
Password Storage
Hash passwords before storing (use bcrypt/argon2 in production)
Data Deduplication
Detect duplicate content by comparing hashes
Digital Signatures
Hash documents before signing for integrity verification
Cache Keys
Generate unique cache keys from content
Data Integrity
Verify data hasn't been tampered with in transit
Related Tools
Need encryption instead of hashing? Try our AES Encryption/Decryption tool. For encoding, check out our Base64 Encoder/Decoder.
Frequently Asked Questions
What is the difference between hashing and encryption?▼
Hashing is a one-way function — you cannot reverse a hash to get the original data. Encryption is a two-way function — you can decrypt encrypted data with the correct key. Hashing is used for data integrity and password verification, while encryption is used to protect data confidentiality.
Is MD5 still safe to use?▼
MD5 is cryptographically broken — collision attacks are practical. It should not be used for security purposes like password hashing or digital signatures. However, MD5 is still acceptable for non-security uses like quick checksums or data deduplication where collision resistance is not critical.
Which hash algorithm should I use?▼
For general purposes, SHA-256 is the recommended choice — it offers strong collision resistance and is widely supported. SHA-512 provides even more security for sensitive applications. For password hashing, use specialized algorithms like bcrypt, scrypt, or Argon2 instead of raw SHA hashes.
Can a hash be reversed to get the original text?▼
No. Cryptographic hash functions are designed to be one-way. You cannot mathematically reverse a hash to find the original input. However, short or common strings can be found using rainbow tables or brute-force attacks, which is why passwords should always be hashed with a salt.
Frequently Asked Questions
❓ Is this tool free?
Yes! All our tools are completely free. No registration, no hidden charges, no ads. Just open and use.
🔒 Is my data safe?
Absolutely. All calculations happen in your browser. We don't store, send, or track any of your data. Everything is processed locally on your device.
📱 Can I use this on mobile?
Yes! All our tools are fully responsive and work perfectly on smartphones, tablets, and desktops.
🌐 Do I need internet?
No! Once the page loads, you can use the tool completely offline. All calculations happen in your browser without any server connection.