--- title: "I Found a New Open Source Grammar Checker Tool And I Like it... Well... Kind of" url: https://daily.dev/posts/i-found-a-new-open-source-grammar-checker-tool-and-i-like-it-well-kind-of-fewylmo1y source_url: https://itsfoss.com/harper-grammar-checker/ type: article source: "It's Foss" published: 2025-07-22T07:08:25.977Z updated: 2026-03-15T04:56:59.781Z tags: ["devtools", "open-source", "privacy"] reading_time: 6 upvotes: 15 comments: 2 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I Found a New Open Source Grammar Checker Tool And I Like it... Well... Kind of **[It's Foss](https://daily.dev/sources/itsfoss)** · 6 min read · 15 upvotes · 2 comments ## Summary Harper is a new open source grammar checker developed by an Automattic developer that processes text locally without sending data to cloud servers. Available as browser extensions and plugins for VS Code and Obsidian, it offers spell checking, repetition detection, and grammar correction with color-coded error types. While faster than cloud-based alternatives due to local processing, Harper has limitations in handling complex grammatical errors and may produce false positives with brand names. It serves as a solid privacy-focused alternative for casual users who don't need advanced AI writing features. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@tanvirshaikh** · 0 upvotes > Much simpler and better **@jkdeguzman** · 0 upvotes > Thank you so much for this! I've been looking for an alternative for ProWritingAid and Grammarly. Then, I saw this! ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 0 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#devtools](https://daily.dev/tags/devtools), [#open-source](https://daily.dev/tags/open-source), [#privacy](https://daily.dev/tags/privacy) [View this post on daily.dev](https://daily.dev/posts/i-found-a-new-open-source-grammar-checker-tool-and-i-like-it-well-kind-of-fewylmo1y)