Fix text in place
Clean up grammar, rewrite awkward sentences, and make text ready to send without leaving the field you are editing.
Your browser can listen, speak,
and correct any text.
Ceres expands what your browser can do, giving you instant tools to process text, use your speech, and combine AI with any site. It transforms your browser from a simple viewer into a powerful workstation where you can rewrite, talk, and extract info without ever switching apps.
Text adjustments with AI
Keep the actions you use most close to the text: proofread, translate, shorten, expand, simplify, or change tone.
Make your own button
Create custom buttons with your own prompts for your specific writing needs.
Speak instead of typing
Speak naturally and turn your voice into text inside websites, then clean it up with the same rewrite buttons and apply it in place.
Listen to summaries
Summarize a page or selected text and have Ceres read it back in your preferred language, so web content becomes easier to follow hands-free.
Read text from images
Extract text from screenshots, images, and video frames, then use it in your writing or notes.
Get explanations
Explain phrases and terms from the page and enable speaking when leaving the screen.
Fix writing, speak, and listen
Start by fixing the text in front of you. Use voice when typing slows you down, and read aloud when reading slows you down.
Quick rewrite
Make rough writing clearer, shorter, friendlier, or ready to send.
Speech-to-text
Talk naturally, turn it into text, then clean it up before sending.
Read aloud in your language
Summarize selected text or a website and let Ceres speak it back in your native language.
Context aware AI Chat
Use more tools when you are ready. Ceres offers a full sidebar with AI chat when you need it.
🌐
Search the internet
Fetch live web data to avoid stale context.
🔗
Read URLs
Pull content from any webpage into your session.
📄
Read PDF Files
Analyze documents directly inside your workspace.
🕘
History Overview
Summarize your browsing history to regain context.
Honest Comparison with AI Tools
This comparison is based on independent usage research and real developer feedback.
We evaluated these tools in everyday scenarios to provide an honest look at their efficiency and context control.
| Feature | Ceres | Sider | Gemini in Chrome | MaxAI | Merlin | HARPA AI |
|---|---|---|---|---|---|---|
| Local models / on-device writing AI | Yes Ollama/LM Studio + Gemini Nano writing actions | No | No | No | No | Yes via Ollama/LM Studio |
| Speech-to-text / voice typing | Yes | Limited | No | No | No | No |
| Read aloud / speech synthesis | Yes | Limited | Limited | Limited | Limited | No |
| Web search | Yes | Yes | Limited | Yes | Yes | Yes |
| Read current page / URL | Yes | Yes | Yes | Yes | Yes | Yes |
| Apply text in place | Yes | No | No | No | No | No |
| Floating writing buttons | Yes | Limited | No | Limited | Limited | No |
| Spoken edit instructions | Yes | No | No | No | No | No |
| Browser use | No | Under construction | Under construction | No | No | Yes |
| PDF support | Yes | Yes | No | Yes | Yes | Yes |
| Image generation | Yes | Yes | No | Yes | No | Yes |
| Custom API providers | Yes | Limited | No | No | No | Yes |
| Free usage | Yes | Yes | Yes | Yes | Yes | Yes |
| Context-aware chat with BYOK | Yes | No | Yes | No | No | No |
| Cost | $29 lifetime | $120+ / year | $239.88 / year Selected countries |
$144 / year | $228 / year | $144 / year |
Checked on April 12, 2026. Browser-extension workflow only. Some pricing is annualized from public monthly plans.
Ceres in your IDE
Ceres respects your token budget. Its lightweight engine reads only what you explicitly attach — no automatic codebase scans, no hidden context consumption. Built to work efficiently with small, local, and budget-friendly models, it keeps usage predictable and costs low while delivering precise AI assistance right where you code.
Fix code in place
Select any block, ask for a change, and see the fix applied directly into your editor without copy‑paste or switching windows.
Review diffs before applying
Preview every AI suggestion side‑by‑side in a diff view, accept what works, and reject what doesn’t — your code never changes without your approval.
Lower your token usage
Ceres never crawls your project. It uses explicit context attachment — only the files, selections or URLs you @Attach are sent to the model. Because each request carries a minimal payload, it reduces token usage, keeps latency low, and delivers faster responses even with small local models.
Attach blocks Print code Review diff Apply suggestions
Bring your own model
Use OpenAI, DeepSeek, Ollama, LM Studio, or any compatible endpoint — the lightweight engine is optimized for small and local models, so you stay fast and budget‑conscious.