RUST WASM · CLIENT-SIDE & PRIVATE

Instant Grammar & Writing Check

Grammar, spelling, punctuation, and style checks running directly in your browser. Fast, private, and unlimited.

Try sample:

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✓ Runs 100% locally

✓

Paste or type your text above and click Check Writing to inspect grammar and spelling.

What Changed?

No changes yet.

OPTIONAL AI IMPROVEMENTS

Improve Writing Tone & Style

Rephrase your writing with Link2Note's hosted AI models. Choose a target tone or provide custom instructions.

Select Tone:

FREE GRAMMAR CHECKER

Check grammar, spelling, punctuation, and style without sending the draft away.

Link2Note's standard writing checker uses Harper compiled to WebAssembly, so the deterministic check runs in your browser. Paste an email, essay, report, application, note, or documentation draft, review each suggestion, apply the fixes you want, and copy the cleaned text when you are done.

The local checker is separate from optional AI rewriting. You can use grammar and spelling checks without an AI model; if you choose a tone rewrite, that is an explicit hosted-AI action with its own quota.

Grammar & spelling

Catch common grammar problems and misspellings while keeping the original draft visible for comparison.

Punctuation & style

Review punctuation and style suggestions, then accept only the edits that make sense for your writing.

Private browser-based checks

Harper runs locally in the browser for the standard check. Your draft is not sent to a grammar-checking server for deterministic proofreading.

Four English dialects

Switch between American, British, Australian, and Canadian English dictionaries for regional spelling conventions.

SOURCE TO NOTES

Need to clean up notes from a source first?

Use Link2Note to turn a video, webpage, or document into structured notes, then bring the saved writing here for proofreading.

YouTube video to notes → Webpage or article to notes → PDF to notes →

GRAMMAR GUIDES

Fix a specific grammar problem.

Use a focused rule guide, compare the examples, then bring your own sentence back to the private checker.

Comma splice → Run-on sentence → Affect vs. effect → Its vs. it's → There / their / they're → Subject-verb agreement → All grammar rules →

FAQ

Free grammar checker questions.

Is the grammar checker free?

Yes. Deterministic grammar, spelling, punctuation, and style checks are unlimited and do not consume source-processing credits.

Does my writing get sent to a server?

Not for the standard writing check. Harper runs as WebAssembly in your browser, so deterministic grammar and spelling checks stay on your device.

What kinds of writing can I check?

Use it for emails, essays, reports, notes, applications, documentation, and other English drafts.

Which English dialects are supported?

The checker supports American, British, Australian, and Canadian English dictionaries.

Is AI required?

No. The core checker is deterministic and local. Hosted AI rewriting is optional and uses a separate daily quota when you choose it.