WebmacOS
Requirements
Supported Chrome, Edge, or Firefox browser; desktop version requires a compatible Mac.
Quick start
Go to the official Get Harper page, choose the browser extension or desktop version, and check permissions and system requirements before installation.
Suitable for bloggers, journalists, and sellers who need to write English copy. Check spelling and grammar via a browser extension or Mac application. Currently supports only English; does not verify facts. Core proofreading is free and requires no paid API.
Last source verification: 2026-10-16. The version field records the upstream release version 2.12.0; builds in browser stores and across platforms may vary. Boloop provides official source links and does not host, install, or hands-on test this software.