Earnest is a minimalist, browser-based writing tool. It lets you get words written in a peaceful environment with no distractions - it does not spell-check your writing, nor does it offer any way for you to format your work, there is no grammar checking and you cannot insert any type of media or HTML, you cannot even edit the words you've already written.

In case you missed that last bit, let me say it again: you cannot edit text you've already written. The delete key does not work in Earnest, you just write, you do not change what you've written. Earnest is about getting words down for your first draft, you can edit later - this tool is a way to force the distinction between writing and editing.