Fast grammar checking

The editor thatstays local.

An offline, privacy-first grammar checker that is fast, open source, and Rust-powered.

OfflinePrivacy-firstOpen source
Open Harper ↗See the edit ↓
Illustrative local editNo upload
Draft / local document

Make every sentence earn its place.

The harness should explain what it changed and why it matters, without sending the draft elsewhere.

SUGGESTION
Keep the sentence direct; preserve the author’s intent.
Document checked locallyComplete