Hash Generator — MD5, SHA-1, SHA-256, SHA-512 Online Free
MD5 —
SHA-1 —
SHA-256 —
SHA-512 —
Paste any text to instantly generate its MD5, SHA-1, SHA-256, and SHA-512 hash values. Useful for verifying file integrity, storing passwords securely, creating checksums, and debugging cryptographic workflows. All hashing runs locally in your browser — your input is never transmitted anywhere.
How it works
- 1 Type or paste your text Enter any text in the input area. The hashes update in real time as you type — no button press needed.
- 2 Read or copy the hash Each algorithm (MD5, SHA-1, SHA-256, SHA-512) shows its hash on a separate row. Click the Copy button next to any row to copy that value to your clipboard.
- 3 Compare with a known hash To verify a file or message, paste the expected hash value and compare it visually with the generated output. A single changed character produces a completely different hash.
Your data stays private
All processing happens entirely in your browser. No files, text, or data are ever sent to our servers. You can disconnect from the internet and this tool will still work.
Frequently asked questions
- What is a hash function?
- A hash function takes any input and produces a fixed-length string of characters. The same input always produces the same hash, but even a one-character change in the input produces a completely different hash. This makes hashes useful for checking data integrity.
- Is MD5 still safe to use?
- MD5 is broken for security-critical uses — it is vulnerable to collision attacks and should not be used for passwords or digital signatures. It remains useful for quick non-security checksums, such as detecting accidental file corruption.
- What is SHA-256 used for?
- SHA-256 is the industry standard for secure hashing. It is used in TLS certificates, JWT signatures, Git commit IDs, blockchain proofs of work, and password storage (often as PBKDF2-HMAC-SHA256). It is considered secure for all current applications.
- When should I use SHA-512 instead of SHA-256?
- SHA-512 produces a 128-character hash versus SHA-256's 64 characters and is marginally faster on 64-bit hardware. Use SHA-512 when you need a larger output space or are working with a system that specifically requires it. For most use cases SHA-256 is sufficient.
- Is SHA-1 safe?
- SHA-1 is deprecated for cryptographic use — collisions have been demonstrated in practice. It still appears in legacy systems and non-security contexts (like Git's older object format), but new designs should use SHA-256 or higher.
- Does this tool send my data anywhere?
- No. All hashing runs entirely in JavaScript inside your browser using the built-in Web Crypto API. Nothing is transmitted to any server. You can disconnect from the internet after loading the page and the tool still works.