Developer Tools
Hash Generator
Generate cryptographic hashes instantly in your browser. Supports MD5, SHA-1, SHA-256, SHA-512. Hash text or files with one click. All processing happens locally — nothing is uploaded.
All hashing happens locally in your browser using the Web Crypto API and a pure JS MD5 implementation.
Cryptographic Hashes in Practice
Hash functions turn any amount of data into a fixed-size fingerprint. They are one-way (you cannot recover the original from the hash) and deterministic. This tool is perfect for verifying file integrity, generating checksums, or quickly getting digests for passwords, tokens, or content identifiers — all without ever sending your data anywhere.
Which Algorithm Should I Use?
- SHA-256 / SHA-512 — Current recommendation for almost all new applications.
- MD5 / SHA-1 — Only use for non-security checksums (e.g., detecting accidental corruption). They are cryptographically broken.
- BLAKE2 — Excellent modern alternative (faster than SHA-3 on many platforms). We focus on the most universally supported algorithms here.
Frequently Asked Questions
Is it safe to hash sensitive data here?
Yes. All hashing is performed entirely in your browser using the Web Crypto API (or a pure JavaScript implementation for MD5). No data ever leaves your device.
Why is MD5 and SHA-1 still available even though they are broken?
They are still widely used for checksums, legacy systems, and non-security purposes. We include them for completeness while clearly labeling modern secure alternatives (SHA-256+).
Can I hash large files?
Yes. The tool streams the file through the hash function without loading the entire file into memory at once (where supported by the browser).