Harper

Harper

Offline-first privacy grammar checker

Description

Want a grammar checker but don't want every word sent to someone's server? Harper is built for being fully offline and privacy-first—grammar and spelling checks run entirely locally, and nothing you write is uploaded. Optimized for developers and writers, it's blazing fast with a tiny footprint, catching capitalization, spelling, repeated words and more. Built by Automattic, free and open source.

Features



Fully offline: checks run locally, content never uploaded.

Privacy-first: collects and transmits nothing you write.

Fast and light: optimized for speed with a tiny footprint.

Many checks: capitalization, spelling, repeated words, word choice.