RUST WASM · CLIENT-SIDE & PRIVATE

Instant Grammar & Writing Check

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

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✓ Runs 100% locally

✓

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

What Changed?

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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:

How Check Writing Works

Privacy First: Zero Server Grammar Calls

Harper compiles directly to WebAssembly and runs inside your browser. When you check spelling, punctuation, or grammar, your words stay on your device.

Unlimited Deterministic Checks

Basic grammar and spell checks never consume your daily source-processing credits. Check as many drafts, essays, or notes as you need.

Separate AI Rewrite Quota

AI Tone and Style improvements use our hosted models and carry their own separate daily quota (5/day for Free, 100/day for Pro), keeping your source notes unaffected.

Full English Dialect Support

Supports American, British, Australian, and Canadian English dictionaries with proper regional spelling rules.