Snag

Beta - This tool is in active development. If you encounter any issues, please report them.

Screenshot-to-text CLI tool powered by vision AI (Google Gemini, OpenRouter, or Z.AI).

Capture any region of your screen and instantly get a markdown description in your clipboard - ready to paste into an LLM, document, or anywhere else.

Features

• Region selection - Click and drag to capture any part of your screen
• Multi-monitor support - Works across all your displays
• Smart transcription - Handles text, code, diagrams, charts, UI elements, and images
• Instant clipboard - Results copied automatically, ready to paste
• Multiple providers - Google Gemini, OpenRouter, or Z.AI (GLM-4.6V)
• Cross-platform - Linux (X11/Wayland), Windows, macOS

Installation

# Install with uv (recommended)
uv tool install git+https://github.com/am-will/snag.git

# Update to latest version
snag --update

Linux Dependencies

X11:

# For clipboard support
sudo apt install xclip  # or xsel

Wayland:

sudo apt install slurp grim wl-clipboard

macOS Permissions

On first run, macOS will prompt for Screen Recording permissions:

1. Grant permission when prompted
2. Restart the app (required for permissions to take effect)
3. On second run, grant "bypass screen capture restrictions" if prompted

You can manage these in: System Settings → Privacy & Security → Screen Recording

Setup

Run snag --setup to configure your API keys and defaults:

$ snag --setup

==================================================
  Current Settings
==================================================

  API Keys:
    Google Gemini:  not configured
    OpenRouter:     not configured
    Z.AI:           not configured

  Defaults:
    Provider: google
    Model:    gemini-2.5-flash

==================================================
  Setup Menu
==================================================

  1. Configure Google Gemini API key
  2. Configure OpenRouter API key
  3. Configure Z.AI API key
  4. Set default provider
  5. Set default model
  6. Exit setup

Get your API keys:

• Google Gemini: https://aistudio.google.com/apikey (free)
• OpenRouter: https://openrouter.ai/keys
• Z.AI: https://open.bigmodel.cn/ (requires GLM Coding Plan)

Usage

# Capture a region (uses defaults from config)
snag

# Use Google Gemini directly
snag --provider google --model gemini-2.5-flash

# Use OpenRouter with any supported model
snag --provider openrouter --model google/gemini-2.5-flash-lite
snag --provider openrouter --model anthropic/claude-3.5-sonnet

# Use Z.AI (GLM-4.6V via MCP) - requires Node.js >= 22
snag --provider zai

# Configure API keys and defaults
snag --setup

# Update to latest version
snag --update

Controls

Action	Result
Left-click + drag	Select region
Release mouse	Capture and process
Right-click	Cancel
Escape or q	Cancel

Keyboard Shortcut (Recommended)

Set up a global keyboard shortcut in your desktop environment to run snag:

GNOME: Settings → Keyboard → Custom Shortcuts → Add:

• Name: Snag
• Command: /path/to/snag (or just snag if in PATH)
• Shortcut: Your choice (e.g., Super+Shift+S)

KDE: System Settings → Shortcuts → Custom Shortcuts → Add

Config Files

Configuration is stored in ~/.config/snag/:

API Keys (.env):

GEMINI_API_KEY="your-gemini-key"
OPENROUTER_API_KEY="your-openrouter-key"
Z_AI_API_KEY="your-zai-key"

Settings (config.toml):

[defaults]
provider = "google"
model = "gemini-2.5-flash"

This location works with keyboard shortcuts (which don't have access to shell environment variables).

Example Output

Capture a code snippet:

**Python Code:**
def hello_world():
    print("Hello, World!")

Capture a diagram:

**Flowchart showing:**
- Start → Process A → Decision
- If yes → Process B → End
- If no → Process C → End

License

MIT