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CapyBro
AI text rewriter for Windows on a single global hotkey
Select text anywhere in Windows (Word, Telegram, IDE, browser) and press Ctrl+Shift+E — AI rewrites it in place. Two backends: OpenRouter cloud (one API key for ~300 models) or Ollama local (text never leaves your PC). MIT-licensed core, $19 one-time Pro — never subscription. NativeNET 8 + WPF, 49 MB installer, <1s cold start. Built solo over 4 months.
Hey Product Hunt 👋
I'm Roman, solo dev from Ukraine, and CapyBro is what I've been building for the past 4 months of nights and weekends.
The story: I was Alt+Tab-ing to ChatGPT 30+ times a day for tiny text fixes — one comma in a Slack message, a paragraph translation, a passive-aggressive DM rewrite. AI was trapped in a browser tab while every other Windows utility lives one hotkey away. So I built it.
What CapyBro does: Select text anywhere on Windows → press Ctrl+Shift+E → AI rewrites it in place. Word, Telegram, VS Code, your browser, Notepad — anywhere.
Two backends:
☁️ Cloud via OpenRouter (one API key gets you GPT, Claude, Gemini, ~300 models)
🔒 Local via Ollama (text never leaves your machine — true privacy)
Tech choices:
• Native .NET 8 + WPF (not Electron) — 49 MB installer, <1s cold start
• MIT-licensed core. The Pro features (curated Prompt Packs, settings backup, usage stats) are $19 one-time. Never subscription. I hate productivity-tool subscriptions.
What I'd love feedback on:
1. Is the workflow obvious from the homepage?
2. What prompts would you add to the built-in library?
3. Mac users: Avalonia port is ~2 months out. Would you use it?
Source code: https://github.com/phantasmat201...
Tech deep-dive on dev.to: https://dev.to/phantasmat2018/af...
Thank you for reading
— Roman
About CapyBro on Product Hunt
“AI text rewriter for Windows on a single global hotkey”
CapyBro was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #121 on the daily leaderboard. Select text anywhere in Windows (Word, Telegram, IDE, browser) and press Ctrl+Shift+E — AI rewrites it in place. Two backends: OpenRouter cloud (one API key for ~300 models) or Ollama local (text never leaves your PC). MIT-licensed core, $19 one-time Pro — never subscription. NativeNET 8 + WPF, 49 MB installer, <1s cold start. Built solo over 4 months.
On the analytics side, CapyBro competes within Productivity, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.7M followers on Product Hunt. The dashboard above tracks how CapyBro performed against the three products that launched closest to it on the same day.
Who hunted CapyBro?
CapyBro was hunted by Roman Tykhonenko. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of CapyBro including community comment highlights and product details, visit the product overview.
Roman Tykhonenko