Euspell

Paste any English text and read it in euspell. It is converted in your browser by the same engine the extension runs.

It is converted in your browser, by the same engine the extension runs, and nothing you type leaves this page. Each word is looked up in the lexicon, and most are left exactly as they are. It gets most of those right, not all of them. The page downloads the engine and the lexicon once, about 1.7 MB between them, and converts everything locally. The same conversion on every page you read A 205000-entry lexicon with part-of-speech disambiguation, wired into the tools you already use.