Ceres - AI Writing, Speech to Text & Local AI

Local AI assistant with on-device AI writing, speech to text, and a built-in screenshot tool.

AI writing and chat assistant with speech-to-text and speech synthesis. Supports Gemini Nano, OpenAI, DeepSeek, and more. Ceres is a complete and open writing assistant that works inside any text field with on-device AI or any LLM you want to plug in. 🟣 Local Writing Assistant 🟣 ➢ Grammar / Spelling fixes on any selected text with on-device AI! ➢ AI rewrites — expand, condense, simplify, format, change tone, and polish transcripts from the speech-to-text feature. ➢ Edits happen directly in the active field (Email, Docs, Dashboard or website form) — no popups. ➢ Custom buttons with your own prompts — create one-click buttons for any task. Define your own prompt (like “make this sound like a pirate” or “convert to bullet points”), name it, and it appears in your toolbar. (killer feature 💀) 🔵 Speech to Text & Speech Synthesis 🔵 ➢ Voice typing on any website with speech recognition available for your native language, or auto‑translate speech to English output! ➢ Offline translation back and forth with English, using automatic language detection right in the field. ➢ Text-to-speech — listen to selected text and hear foreign‑language text spoken in your native language. (killer feature 💀) ➢ Optical character recognition on any image or video with instant copy! ➢ Summary page with TTS reading aloud in your language. 🟢 Any LLM Browser Assistant 🟢 ➢ Context-aware chat — chat with your own LLM, aware of open tabs and PDFs. ➢ Instant apply AI‑written articles to any page. (killer feature 💀) ➢ Chat session can generate images if you configure the correct image generation model. ➢ Convert speech inside websites with Gemini or GPT audio to high‑quality transcripts. (optional) 🟡 Screenshot Tool🟡 ➢ Crop what you need — keep only the useful part of an image and cut out extra space before using it. ➢ Remove background — pull out the subject, logo, or product quickly for a clean result. ➢ Upscale small images — increase size when a screenshot, logo, or asset is almost usable but still too small. ➢ Crop and attach — cut out part of an image and merge it onto another using overlay mode. ➢ Add logos, stamps, or labels directly while browsing. ➢ Convert formats — save as WebP, PNG, or JPEG for the page you're building. 🟠 Use cases 🟠 ➢ Reply to a work email by speaking in Greek ➜ then translate to English. (killer feature 💀) ➢ Clean up a messy Notion list ➜ attach to chat ➜ then make it a complete paragraph. ➢ Draft an email by speaking raw ideas ➜ press the “shorter” button ➜ your messy text becomes usable! (killer feature 💀) ➢ Fix spelling on sales articles ➜ select text ➜ hit “Grammar / Spelling” ➜ correction appears in place. ➢ Summarize a long article ➜ ask Ceres ➜ listen while you keep working. ➢ Re‑write offline when the connection drops — the on‑device model handles writing and voice tasks everywhere. ⚪ Technology ⚪ Ceres uses on‑device/local AI (Gemini Nano managed by Google Chrome) for writing tasks, Tesseract for Optical Character Recognition, and browser capabilities for speech synthesis and speech recognition. Additionally, you can use your favorite AI provider to power the enriched Chat Copilot. ⚫ Technology⚫ Computer must support Chrome’s built‑in AI, with a suitable GPU or a CPU setup with at least 16 GB of RAM and 4 CPU cores. The first run may also need time to download the model. If the browser cannot run on‑device AI on your computer, you can always connect your writing buttons to an AI provider in settings. After that, Ceres will use the selected provider for these AI features. Enjoy — a browser with superpowers, powered by your computer or your chosen LLM!