Hash Generator Online — MD5, SHA-256, SHA-512, Free
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly.
About This Tool
Generate cryptographic hashes in your browser
Compute MD5, SHA-1, SHA-256, SHA-384, or SHA-512 hashes from any text or file. Useful for verifying file integrity, generating checksums, or working with APIs that require hash authentication.
Everything runs locally — your data never leaves your device. SHA hashes use the browser's native Web Crypto API for maximum performance.
5 Algorithms
MD5, SHA-1, SHA-256, SHA-384, and SHA-512.
Text & Files
Hash text input or upload any file to compute its hash.
100% Private
All hashing runs locally in your browser. Nothing uploaded.
Instant
Hashes are computed in real-time as you type.
Quick Start
How to Generate a Hash
Pick Algorithm
Choose MD5, SHA-1, SHA-256, SHA-384, or SHA-512.
Enter Input
Type text or upload a file to hash.
Get Hash
The hash is generated instantly as you type.
Copy
Click Copy to grab the hash for your use.
Reference
Hash Algorithm Comparison
| Algorithm | Output Length | Security | Best For |
|---|---|---|---|
| MD5 | 128-bit (32 chars) | Broken | Checksums, non-security uses |
| SHA-1 | 160-bit (40 chars) | Weak | Legacy compatibility |
| SHA-256 | 256-bit (64 chars) | Strong | General purpose, APIs, blockchain |
| SHA-384 | 384-bit (96 chars) | Strong | TLS certificates |
| SHA-512 | 512-bit (128 chars) | Strong | Maximum security, file integrity |
Use Cases
When to Use Hash Generator
Cryptographic hashing is used across security, data integrity, and software development workflows.
Password Hashing
Generate SHA-256 or SHA-512 hashes to understand how passwords are stored securely in systems.
File Integrity Checks
Hash a downloaded file and compare it to the published checksum to verify it has not been tampered with.
API Key Generation
Generate a unique MD5 or SHA hash from input data to create deterministic API keys or tokens.
Deduplication
Hash file contents to detect duplicate files in a dataset without comparing byte by byte.
Digital Forensics
Hash files or strings as evidence fingerprints during security investigations or audits.
Learning Cryptography
Experiment with MD5, SHA-1, SHA-256, and SHA-512 outputs to understand hashing behaviour firsthand.
FAQ
Frequently Asked Questions
A hash is a fixed-length string computed from input data. The same input always gives the same hash, but you can't reverse it. Used for integrity checks, passwords, and signatures.
SHA-256 for most purposes. SHA-512 for maximum security. MD5 only for non-security checksums — it's cryptographically broken.
Yes. All hashing runs in your browser using the Web Crypto API. Your data never leaves your device.
Yes. Click the File button to select any file. It's read locally and hashed in your browser — never uploaded.
Researchers have found practical collision attacks — two different inputs that produce the same hash. This makes them unsafe for security, but still fine for simple checksums.
No. Hashing is a one-way function. You cannot reverse a hash to get the original input. This is by design — it's what makes hashes useful for password storage.