Syntaxis is a Chrome writing assistant positioned as a private AI proofreading tool that βdoesnβt phone home.β It uses Google Gemma models and runs locally on the userβs computer via WebGPU, meaning text is not sent to external servers and no data is collected. Its main features include real-time grammar, spelling, and wording suggestions while you type, plus the ability to proofread or rewrite selected text via the right-click menu.
Based on the available information, Syntaxis works across common Chrome writing environments such as Gmail, Google Docs, social media, and web forms. It offers unlimited proofreading and rewriting, five correction-strength levels, custom instructions, and protection for sensitive sites. Because the model runs locally, there is no server round trip, so responses should in theory feel more direct. That said, the official materials note that the initial model load takes about 10 seconds, and it requires at least 4GB of memory, a WebGPU-compatible GPU, and Chrome 121 or newer.
Its biggest advantage is privacy: text physically stays on the local machine, rather than relying only on a providerβs promise. This is especially appealing for users working with emails, forms, or sensitive drafts. However, the compact local model also has natural limits. The company clearly states that it is good at fixing grammar, spelling, and awkward phrasing, but it is not on par with large cloud-based models; complex rewriting and highly nuanced semantic suggestions will be limited. In addition, because there is no server-side external content filtering, users need to review all outputs themselves.
Pricing is straightforward: a one-time purchase of $14.99 for lifetime use, or $1.99/month with the option to cancel. A 14-day free trial is available with no credit card required. If you only need everyday proofreading inside the browser and your hardware meets the requirements, the lifetime license offers strong value for money.
Syntaxis is best suited to individual users who care about privacy and primarily write English emails, documents, social media posts, and web form content in Chrome. It is not ideal for users expecting complex long-form rewrites, advanced multilingual polishing, or cloud-LLM-level output quality. Availability in mainland China has not been disclosed; since installation depends on the Chrome Web Store, actual access may be affected by the local network environment. Supported payment methods are not specified. Comparable alternatives include Grammarly, LanguageTool, Microsoft Editor, DeepL Write, and QuillBot.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on syntaxis.app official site.
syntaxis.app is an Unknown AI Apps provider. TG4G tracks its product information, with monthly pricing from $14.99, an overall rating of 8.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach syntaxis.app directly.