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That doesn't mean you can't use AI or a web-based service at all to check over your writing, though. The best grammar checkers on the market rely on AI to enhance the writing you feed into them ...

LanguageTool is an open-source grammar checker that supports multiple languages, including Portuguese, and is a great free alternative. Hemingway Editor helps you improve the readability of your writing by identifying complex sentences, adverbs, and passive voice.