Psaiduck
A lightweight macOS menu bar app that explains selected text or screen regions using AI
Powerful Features
Everything you need to understand and analyze text with AI, right from your menu bar.
Explain Selected Text
Select any text in any application and get instant AI-powered explanations with a simple hotkey.
Screen Capture & OCR
Capture any region of your screen and extract text using local OCR. Screenshots are processed on your Mac — only the extracted text is sent to the AI.
Custom Actions
Create your own actions with custom prompts and hotkeys tailored to your workflow.
Follow-up Questions
Ask follow-up questions to dive deeper into explanations and have natural conversations.
Beautiful Markdown
Responses are rendered with rich markdown formatting including code blocks and tables.
Completely Free
The app is free to use — you only pay for OpenAI API usage. A typical day of use costs around 1-2 cents.
Getting Started
Get up and running in just a few simple steps.
Download
Download the latest version of Psaiduck from the link above.
Install
Unzip and drag Psaiduck to your Applications folder.
Grant Permissions
Open the app and grant Accessibility permissions when prompted. When you first use an action, macOS will ask to allow pasting from Psaiduck — click "Always Allow" to enable this.
Set API Key
Click on "Set API Key" in the menu and enter your OpenAI API key.
About API Keys
Psaiduck requires an OpenAI API key to function. Your API key is stored securely in your macOS Keychain and is never shared with anyone — it's only used to communicate directly with OpenAI's API. Get your API key at platform.openai.com.
How to Use
Master Psaiduck with these default actions and tips.
Default Actions
Explain Selected Text
⌥⇧ESelect any text and press the hotkey to get an AI explanation.
Explain Screen Region
⌥⇧SCapture a screen region and extract text for analysis.
Translate to English
⌥⇧TTranslate selected text to English instantly.
Pro Tips
Use the menu bar icon to quickly access all your actions
Create custom actions for tasks you perform frequently
Ask follow-up questions to dive deeper into explanations
The app launches at login by default for quick access
Create Custom Actions
Click "Manage Actions" in the menu to create your own actions with custom prompts and hotkeys. Perfect for:
- • Code explanations and reviews
- • Language translations
- • Summarizing long articles
- • Grammar and writing improvements