---
title: "Grammar check"
description: "As you write, Doota catches spelling and grammar slips — entirely on your device, so your draft never leaves your computer to be checked."
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.doota.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Grammar check

As you write a message, Doota quietly checks your spelling and grammar and
underlines anything worth a second look:

- a **red** wavy underline for a likely **spelling** slip
- an **amber** wavy underline for a **grammar or punctuation** nudge

**Click (or tap) an underline** to see the issue and up to a few fixes — pick one
and Doota swaps it in (with a quick green flash so you can see what changed).
Don't agree? Ignore it and keep typing; nothing changes unless you choose a fix.

The check is always on while you're writing — there's no switch to turn it off.
It's unobtrusive, though: it only underlines, and acts only when you pick a fix.

A small **spell-check pill** in the composer toolbar shows the state at a glance:
a checkmark when you're clean, or a count when there are things to look at. Hover
it and it tells you the check runs on-device.

> **It never leaves your device**
>
> The grammar check runs entirely in your browser (the Harper engine, loaded once).
> Your draft is **never uploaded** anywhere to be checked — the same privacy posture
> as the rest of Doota. That's also why the very first check after opening a
> composer takes a moment to warm up.

Source: https://docs.doota.dev/guide/grammar-check/index.mdx