Enhance your writing. Detect passive voice, adverbs, and complex sentences instantly.
The Grammar & Style Checker by GrowthSyntax is a free, browser-based writing analysis tool that helps writers, bloggers, editors, and content creators detect passive voice, overused adverbs, and overly complex sentences in real time. Powered by the Flesch-Kincaid readability formula, the Grammar & Style Checker gives your writing a grade level score and highlights every area that needs improvement — instantly, privately, and without uploading your text anywhere.
The Grammar & Style Checker is a smart writing style analyzer inspired by the Hemingway Editor approach. It scans your text and highlights four types of writing issues: adverbs that weaken your prose, passive voice constructions that reduce impact, sentences that are hard to read due to length, and sentences that are very hard to read due to dense complexity. It also calculates your Flesch-Kincaid grade level to show exactly which audience your content targets.
Search engines like Google use readability signals to evaluate content quality. Pages with clear, concise, and well-structured writing tend to rank higher, attract more backlinks, and retain readers longer. Passive voice, adverb overuse, and long complex sentences all reduce readability and increase bounce rates. The Grammar & Style Checker helps you write content that is not only easier to read but also more likely to perform well in organic search results.
Automatically identifies every passive voice construction in your text and highlights it in cyan so you can rewrite for stronger, more active writing.
Flags all adverbs ending in "-ly" with a purple highlight and shows a dynamic target based on your total word count to help you reduce filler language.
Identifies sentences over 14 words as hard to read and sentences over 20 words as very hard to read — helping you break up dense paragraphs for clarity.
Calculates your writing's US school grade level using the Flesch-Kincaid formula so you know exactly which reading level your content is targeting.
Tracks your word count in real time and sets intelligent adverb and passive voice targets that scale proportionally with the length of your content.
The Grammar & Style Checker runs entirely in your browser. No text is sent to any server — your writing stays completely private at all times.
Stop publishing writing that loses readers. Use the Grammar & Style Checker by GrowthSyntax to detect passive voice, cut unnecessary adverbs, simplify complex sentences, and improve your readability grade — completely free, instantly, and always private.