Autocorrects text as you type Silently. No interruptions
Fixes grammar, spelling and phrasing as you type — silently. No red underlines, no popups. Just clean, native-sounding English, everywhere you write.
One extension. Every tab.
Compose windows, replies, comments, DMs — first-class adapters for the places you write most.
Every red underline is a tap on the shoulder.
The same email from above — retyped with a typical checker watching. Hover the underlines.
Install it. Then forget it exists.
That's the whole product philosophy. The less you notice KnightWriter, the better it's working.
Add to Chrome
One click from the Chrome Web Store. Pick how you learned English — we tune corrections to it. No account gymnastics, no onboarding tour you'll skip anyway.
Type like you always do
Emails, posts, DMs, docs. Mistakes are corrected in place as you write — spelling, grammar, and awkward phrasing. No accepting, no reviewing, no clicking.
Pause to peek
Stop typing for two seconds and a small knight appears with what changed. Start typing again and it vanishes. It waits for you — never the other way around.
Silent by default. Powerful on demand.
Most of the time you'll never open it. But when a message really matters, the side panel gives you the full workshop — without ever touching your flow on the page.
Correct is the floor. Native is the point.
Most tools fix errors. KnightWriter fixes patterns — the phrasing that's grammatically fine but quietly marks you as a non-native writer. It knows the habits of your first language and smooths them out. Sound-native profiles are in beta while we finish testing — they get sharper every week.
Built different. On purpose.
Traditional writing tools are reviewers — they flag, you fix. KnightWriter is an autocorrect — it fixes, you write.
Silent about your words, too.
A tool that reads everything you type should be paranoid on your behalf. We are.
In and out, in memory
Your text is corrected in-flight and immediately discarded. Nothing you write is ever stored on our servers. Not drafts, not fragments, not metadata about your sentences.
Never used for training
Your writing is your writing. It is never used to train AI models — ours or anyone else's. That's a contractual promise, not a settings toggle you have to find.
Sensitive fields ignored
Passwords, card numbers, OTPs and other sensitive fields are detected and skipped entirely — that text never leaves your browser in the first place.
One plan. Three ways in.
The full product on every tier — only the correction meter differs. Pay for quiet, get quiet.
Fair questions.
Pause for two seconds and the knight shows you exactly what changed — one click opens the side panel, where your original text is kept untouched and can be restored. KnightWriter is also deliberately conservative: it corrects errors and unnatural phrasing, it doesn't rewrite your ideas, your tone, or your slang. "gonna" stays "gonna" if that's your style.
During the beta phase, registered users get KnightWriter free with a limited number of autocorrections per day. When beta ends, every early-access account converts to a full, unlimited 14-day trial. After the trial, pick a plan to continue. One honest note: this early-access window won't repeat — once beta closes, KnightWriter becomes trial-only.
Most writing tools are reviewers: they underline, you evaluate, you click. KnightWriter is an autocorrect: it fixes as you type and stays out of sight. And where grammar checkers stop at "technically correct," KnightWriter naturalises phrasing so your writing reads like a native speaker's — that's the whole reason it exists.
Healthy instinct. Text is processed in memory, corrected, and discarded — never stored, never used for training, never sold. Password, payment and OTP fields are skipped entirely, so that text never leaves your browser. The full privacy policy is written in plain English, and it's short.
Chrome today (and Chromium browsers like Edge, Brave and Arc), with Safari next. It has first-class support for Gmail, LinkedIn, Slack, Notion, X, WhatsApp Web, Outlook, ChatGPT, Claude and Messenger, plus a general engine for nearly any text field on the web.
No — there's a General profile that works for everyone. But if you pick the profile matching your first language, corrections get noticeably sharper, because the patterns worth fixing differ between, say, Korean-influenced and Spanish-influenced English. Profiles are currently in beta and improving fast.
Stop proofreading.
Keep writing.
Limited early access. Silent forever.