CapyBro
AI text improvement in one click via global hotkey for Windows
A Windows utility that rewrites, fixes, or translates selected text with AI using a global hotkey, working in any application without leaving your context.
About this launch
CapyBro is a Windows tray application that brings AI text improvement into any program you use. Select text in Word, your browser, email, or any IDE, press a hotkey, and the AI rewrites, fixes grammar, or translates the text in place—no window switching or copying required.
You can choose between cloud AI models via OpenRouter (GPT-4o, Claude, Gemini, and others) or run models fully locally via Ollama with zero network requests. Create unlimited custom prompts with dedicated hotkeys and separate models for each task. The program stores API keys encrypted locally and keeps a local history of all operations.
The core version is free forever and open-source under the MIT license. An optional one-time $9 Pro upgrade includes premium prompt packs, history export, a model-switch hotkey, and priority support.
What it does
- Global hotkey text rewriting in any application
- Cloud AI via OpenRouter (GPT-4o, Claude, Gemini, Llama, DeepSeek, Mistral)
- Fully local AI via Ollama with zero network requests
- Unlimited custom prompts with dedicated hotkeys
- Local improvement history and operation tracking
- Privacy-preserving PII redaction for emails, phone numbers, and credit cards
- Diff preview to compare original vs AI result before applying
- Streaming responses to watch AI generation in real time
- Multilingual UI in English, Ukrainian, and Russian
- Native .NET 8 implementation without Electron
Pricing
Pricing model: Freemium
Free version: $0 forever. Pro version: $9 one-time payment (no subscription).
Shopper questions
Is CapyBro free and open-source?
Yes. CapyBro's core is free forever and open-source under the MIT license. There is no trial, no nag screens, and no subscription. An optional one-time $9 Pro upgrade adds premium prompt packs, history export, a model-switch hotkey, and usage statistics, but the free version is the complete hotkey-rewriting workflow.
Which operating systems are supported?
For now, only Windows 10 and Windows 11 (x64). macOS and Linux versions are not planned because the program uses specific Windows APIs for hotkeys and text-pasting into other programs.
Is internet required for it to work?
It depends on the mode. In OpenRouter mode, yes, because the AI runs in the cloud. In Ollama mode, no—the AI runs on your computer with zero network requests.
What is CapyBro?
CapyBro is a free, open-source (MIT) Windows tray app that rewrites, fixes, or translates selected text with AI on a global hotkey. Select text in any program — Word, a browser, an IDE, an email client — press Ctrl+Shift+E, and the AI improves it in place. It runs natively on .NET 8 (not Electron), works with cloud models via OpenRouter or fully offline via Ollama, and keeps your text private with no telemetry. The core is free forever; an optional one-time $9 Pro adds extras, with no subscription.
Which AI models are supported?
Through OpenRouter — all the major ones: GPT-4o, Claude Sonnet, Gemini, Llama, DeepSeek, Mistral, and others (the full list is constantly updated). Through Ollama — any model you've downloaded locally (gemma, llama, mistral, qwen, etc.).
CapyBro has a free listing. The owner can unlock the full profile with a paid launch for $5:
- Founder story (locked)
- Milestones (locked)
- Demo video (locked)
- Dofollow website link (locked)
