A very basic, strictly browser-based tool that lets you generate an IOTA seed.
Do not use load this tool from a server! Make sure to download a local copy of it and load this file using your browser.
Be sure to check the source of this tool to ensure that no external JavaScript is being loaded! You will want to search for an src attribute that is used for loading a JavaScript file.
If you see any such reference then the version you have downloaded is compromised! Do not use that version to generate a seed!
IOTA: FWQOFSMOMMVM9BXXZANEQOBDHWBDGYLXTRJTXSZIWVM9N9Z9JPRUBTLE9CRXBZYCW99OSIQ9NHNKDGOXXMDEKY9GQW
BTC: 15UFaeeSM1Wn46uJxBg4B5umTVrJghdkA3
ETH: 0x685c60C341ED1a9aAe87c31364Adf34fe0C3F61A
XRP: rNaQkgWR2pbgMerCorqXLgepKkQQAfCNLL