Hashing is one of the most fundamental operations in computing and security. Whether you are verifying a file download, building an API, checking data integrity, or debugging authentication code, you need a reliable way to generate cryptographic hashes quickly. This guide explains the most common hash algorithms and shows you how to generate them for free in your browser — without sending your data anywhere.
Hash Algorithm Comparison
| Algorithm | Output Length | Speed | Security Status |
|---|---|---|---|
| MD5 | 128-bit (32 hex) | Very fast | Broken — avoid for security |
| SHA-1 | 160-bit (40 hex) | Fast | Deprecated — avoid for new use |
| SHA-256 | 256-bit (64 hex) | Fast | Current standard |
| SHA-384 | 384-bit (96 hex) | Moderate | Secure |
| SHA-512 | 512-bit (128 hex) | Moderate | Most secure SHA-2 |
Step-by-Step: Generate a Hash
Go to webtoolsz.com/hash-generator. All processing happens in your browser — nothing is uploaded or stored.
For text, type or paste your string in the text area. For files (ISO images, downloads, etc.) switch to the File tab and upload the file directly.
Check the algorithms you need. For most uses, SHA-256 is sufficient. For file verification, use the algorithm specified by the software vendor.
Results appear instantly. Click the copy button next to each hash to copy it to your clipboard.
When to Use Each Algorithm
- MD5 — Legacy checksums, cache keys, non-security file verification. Never for passwords.
- SHA-1 — Legacy systems only. Not recommended for new implementations.
- SHA-256 — The safe default. Use for file integrity, API signatures, JWT HS256, TLS certificates.
- SHA-512 — When extra security margin is needed — database password hashing (with salt), digital signatures.
- HMAC-SHA256 — API webhook verification, JWT HS256 signing, request authentication tokens.
Generate MD5, SHA-256, SHA-512 Hashes — Free
Browser-based. Text or file input. HMAC support. Nothing uploaded. No sign-up.
Open Hash GeneratorFrequently Asked Questions
What is the difference between MD5, SHA-1, SHA-256 and SHA-512?
MD5 produces a 128-bit hash and is fast but cryptographically broken. SHA-1 produces 160 bits and is deprecated. SHA-256 (SHA-2 family) produces 256 bits and is the current standard. SHA-512 produces 512 bits and offers a larger security margin. For new projects, always use SHA-256 or SHA-512.
Is MD5 safe to use?
MD5 is not safe for cryptographic security purposes — it is vulnerable to collision attacks. For password hashing use bcrypt or Argon2. For data integrity of non-sensitive files, MD5 is still widely used due to its speed, but SHA-256 is preferred.
What is HMAC and when should I use it?
HMAC (Hash-based Message Authentication Code) combines a hash function with a secret key. Unlike plain hashing, HMAC verifies both data integrity and authenticity. Use HMAC for API authentication, webhook verification, and message signing — anywhere you need to prove a message came from a trusted source.
Can I verify a file's hash to check for tampering?
Yes. Upload the file to the Hash Generator, compute its SHA-256 or SHA-512 hash, and compare it to the hash published by the official source. If the hashes match exactly (case-insensitive), the file is genuine. This is standard practice for verifying ISO images and software installers.