ttyper runs a Rust-based typing test in the terminal, according to its repository description.
Open source
24 alternativesHarper
Harper checks grammar and spelling offline and is written in Rust, according to its repository.
About Harper
Harper is an open-source English grammar and spelling checker written in Rust that is designed to work offline. It can load via WebAssembly and lists support documentation for Visual Studio Code, Neovim, Helix, Emacs, Zed, and Obsidian. Harper currently supports English only.
Key features
- Checks English grammar and spelling while working offline
- Open-source Rust codebase under Apache-2.0 license
- Loads via WebAssembly
- Supports Visual Studio Code, Neovim, Helix, Emacs, Zed
- Includes documentation for use with Obsidian
Best for: Writers and developers who want an offline, open-source English checker for supported editors.
Good for
- Works offline rather than sending text to remote servers
- Open-source code under Apache-2.0 license
- Small enough to load via WebAssembly
Watch out for
- Currently supports English only
Harper at a glance
- Website
- github.com/automattic/harper
- Category
- Online Tools › Text Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Harper alternatives
Tools and sites you could use instead, ranked by how closely they match.
Harper checks grammar and spelling locally on a device, with an open-source project page for writers and developers.
LanguageTool checks grammar and style across more than 25 languages, according to its project description.
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WritingTools is a system-wide grammar assistant, according to its repository description.
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Buzz transcribes and translates audio offline on a personal computer, using Whisper models according to its project description.
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Harper FAQ
Which languages does Harper support?
Currently only English. The repository states the core is extensible to other languages.
Does Harper work offline?
Yes, it is described as an offline checker that processes documents locally.
Which editors have documented support?
Visual Studio Code, Neovim, Helix, Emacs, and Zed are listed, along with Obsidian.
Is something wrong or out of date?
Tell us and an editor will check it.
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