title: Excel formula-based function for SHA256 / SHA512 hashing without VBA or macros
body: <p>It's the year 2017 and anybody who needs to use hashes should avoid 'broken' ones such as MD5, if security is important. Has anybody found or created a way to do more secure SHA256 or SHA512 hashing in Excel, without using VBA or macros?</p>
  
  <p>A spectacular example of this being done before was over 3½ years ago with MD5 (as seen in this SO: <a href="https://stackoverflow.com/q/15201297/3598766">MD5 Hash function in excel without using VBA</a>).</p>
  
  <p>Reason for avoiding VBA/Macros: Compatibility with mobile devices, such as Excel for iOS.</p>
  
  <p>Side Note: The original Stack Overflow post has a successful answer with a dead link, here is a new link for reference: <a href="https://tzamtzis.gr/2017/web-analytics/excel-function-md5-hashing-without-vba/" rel="noreferrer">https://tzamtzis.gr/2017/web-analytics/excel-function-md5-hashing-without-vba/</a></p>