# Thoughts & Guides ## How to Build a Hash Generator in JavaScript (MD5, SHA-256) Build the tool behind our Hash Generator: compute SHA-1, SHA-256 and SHA-512 with the Web Crypto API, add a compact MD5 (which the browser deliberately omits), hash both text and files, and understand why MD5/SHA-1 must never guard passwords. Cited to MDN, RFC 1321 and NIST. --- *Source: [ocxly.com/blog.html](https://ocxly.com/blog.html) — OCXLY, free 100% client-side privacy-first tools. Articles, guides, and research from across the OCXLY ecosystem — AI Labs, Neuro Labs, OcxlyDev, and OIAS.*