Correctly

6.9easy start · #50of 88
in Grammar checkers

Free to practise onyes
Well documentedyes
Runs where you workno

Runs on Browser.

Correctly is ranked #50 of 88 in grammar checkers on The Geeks Club. It runs on Browser extension. There is a free plan.

Correctly plans and pricing

All plans

Correctly Free Open-source browser extension · bring your own API key for hosted providers iamaamir.github.io · 9 Oct 2026

Compared on grammar checkers

Supported languages: 1 languages
Browser extension: Yes
Team administration: No

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The record

What it does: Correctly checks writing in place for grammar, spelling, and punctuation using AI.
Supported browsers: The maker provides packages for Chrome/Chromium and Firefox; the landing page also names Edge, Brave, and Opera as Chrome-compatible options.
Input support: The extension works on text inputs, textareas, and contentEditable elements.
Inline suggestions: Corrections appear in an inline tooltip where users can accept or dismiss each suggestion.
Languages: The README says English is currently supported, with more languages coming.
AI providers: Supported providers include OpenAI, OpenAI-compatible APIs, Ollama, LM Studio, and Chrome's built-in Gemini Nano.
Integrations: The maker names Groq, OpenRouter, and DeepSeek as examples of OpenAI-compatible services.
Local AI: Ollama and LM Studio can run local grammar checks, and Chrome Free AI uses on-device Gemini Nano.
BYOK: Users provide their own API key for OpenAI or compatible endpoints and choose a model in the extension popup.
Privacy: The maker says there is no Correctly cloud or account, and that text is processed locally or sent directly to the provider the user configures.
Key storage: The README says API keys are stored in local browser extension storage and sent only to the chosen AI provider.
Sensitive fields: Password fields, credit card inputs, and other sensitive field types are automatically excluded; individual elements can opt out with data-correctly="false".
Notable limit: When using providers other than Chrome Free AI, text is sent to the chosen AI provider for grammar checking.
License: Correctly is open source under the BSD 3-Clause License.
Price from: Free

Where it ranks on The Geeks Club

Best Grammar Checkers in 2026#50 of 88
Best AI Grammar Checkers in 2026#22 of 26

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Sources

github.com/iamaamir/Correctly· checked 9 Oct 2026
iamaamir.github.io/Correctly/· checked 9 Oct 2026