Grammar Check SLM

Private, on-device grammar and spell checking powered by local small language models with WebGPU acceleration.

Write clearly and confidently with less time spent proofreading. Grammar Check SLM catches grammar, spelling, and punctuation mistakes as you type and provides quick, precise corrections—all while processing your writing locally so it never leaves your browser. FEATURES • 100% private — every grammar check runs locally on your device. • Local AI by default — uses Qwen3.5 0.8B on WebGPU-capable devices or Qwen3 0.6B on older and memory-constrained devices. • Hardware acceleration — supports WebGPU, with a compatible WASM option using Qwen3 0.6B. • Optional Chrome built-in AI — supports the Prompt API with Gemini Nano when available and explicitly set up. Automatic mode uses Chrome AI when ready and otherwise uses the selected local model. • Offline after setup — local model files are downloaded once, cached on your device, and available without an internet connection. • Works where you write — supports rich-text editors, contenteditable fields, textareas, and standard text inputs. • Non-destructive highlights — displays precise wavy underlines without moving your cursor or modifying text. • Built-in editor — paste text into the popup to review corrections, compare changes, recover drafts, and copy the corrected result. • Right-click correction — select text on any page to correct it in place or copy the corrected version when the text is read-only. • Configurable — choose the AI engine, local model, acceleration method, typing delay, supported field types, language, and per-site access rules.