Hash Generator
Generate MD5, SHA-256, SHA-512, and HMAC hashes for any input instantly
Generate cryptographic hashes for any text input instantly. Supports MD5, SHA-1, SHA-256, SHA-512, and HMAC variants. Use for data integrity checks, password hashing, API signature verification, and more.
Hash Algorithms Explained
| Algorithm | Output Length | Use Case | Security |
|---|---|---|---|
| MD5 | 128-bit (32 hex) | Checksums, legacy | Broken for security |
| SHA-1 | 160-bit (40 hex) | Git commits, legacy | Deprecated |
| SHA-256 | 256-bit (64 hex) | Signatures, HMAC | Secure |
| SHA-512 | 512-bit (128 hex) | High-security needs | Very secure |
| bcrypt | Variable | Password storage | Designed for passwords |
When to Use Which Hash
- MD5 — file integrity checks only (not security)
- SHA-256 — API request signing, data integrity, JWT signatures
- SHA-512 — high-security document hashing
- bcrypt/Argon2 — password storage (uses salt and work factor to resist brute force)
HMAC Hashing
HMAC (Hash-based Message Authentication Code) adds a secret key to the hash — proving both the integrity and the origin of a message. Used in:
- Webhook signature verification (Stripe, GitHub, Shopify all use HMAC-SHA256)
- API request signing (AWS Signature v4)
- JWT signature verification
Verifying Webhook Signatures
If you're building integrations that receive webhooks, always verify the HMAC signature to prevent spoofed requests. Python FastAPI Webhook Automation and n8n Webhook Tutorial both walk through implementing this exact HMAC verification step. Need help implementing secure webhook verification for a specific integration? Get in touch.
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