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
What is a hash?
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.
Which algorithm should I use?
SHA-256 for most purposes. SHA-512 for maximum security. MD5 only for non-security checksums — it's cryptographically broken.
Is my data safe?
Yes. All hashing runs in your browser using the Web Crypto API. Your data never leaves your device.
Can I hash a file?
Yes. Click the File button to select any file. It's read locally and hashed in your browser — never uploaded.
Why are MD5 and SHA-1 marked as broken/weak?
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.
Can I decrypt a hash?
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.