pixelbrowse

name	pixelbrowse
description	Screenshot and visually read any web page or document using pixelshot. Use instead of fetching raw HTML when you need to see what a page looks like, read visual content (charts, diagrams, infographics), check layouts, or verify UI. Triggers: "look at this page", "screenshot", "what does this site look like", "check the UI", "read this visually", "view this URL", viewing web content.
allowed-tools	Bash, Read

PixelBrowse — Screenshot-based Web Reading

Use pixelshot to capture any URL or document as tiled JPEG images, then read the images visually.

Requires the pixelshot command on PATH. If pixelshot is not found, install it (isolated, on PATH): uv tool install pixelrag (or pipx install pixelrag, or pip install pixelrag) — then retry. Don't go hunting for it in project venvs.

How to use

# Screenshot a URL (optimized for Claude's vision: 1568px tile height)
pixelshot <url> --output /tmp/pixelbrowse --tile-height 1568 --wait-network-idle

# Screenshot multiple URLs in parallel
pixelshot <url1> <url2> --output /tmp/pixelbrowse --tile-height 1568 --wait-network-idle --workers 4

# Wider viewport for desktop layouts
pixelshot <url> --output /tmp/pixelbrowse --tile-height 1568 --viewport-width 1280 --wait-network-idle

# Render a PDF
pixelshot document.pdf --output /tmp/pixelbrowse

IMPORTANT: Always use --tile-height 1568 for screenshots you will read visually. Claude's vision model downscales images with long edge > 1568px (Sonnet/Haiku) or 2576px (Opus). The default 8192px tile height will be downscaled and text becomes unreadable.

IMPORTANT: Always use --wait-network-idle for URLs. Without it, JavaScript-heavy pages (most modern sites / single-page apps) are captured before they finish rendering and come back blank or half-empty. It waits for the page's load event plus a brief network-quiet window so client-rendered content is actually on screen.

After rendering, read the tile images from the output directory to visually understand the content.

Workflow

1. Run pixelshot <url> --output /tmp/pixelbrowse --tile-height 1568 --wait-network-idle
2. Read /tmp/pixelbrowse/<domain>.png.tiles/tile_0000.jpg directly (no need to ls — the naming is deterministic)
3. If the page is long, also read tile_0001.jpg, tile_0002.jpg, etc.

Output path pattern: /tmp/pixelbrowse/<sanitized-url>.png.tiles/tile_NNNN.jpg

• For https://news.ycombinator.com → /tmp/pixelbrowse/news.ycombinator.com.png.tiles/tile_0000.jpg
• For https://example.com/page → /tmp/pixelbrowse/example.com_page.png.tiles/tile_0000.jpg

Do NOT run ls — just read tile_0000.jpg. If it doesn't exist, the page had no content.

Crop & Zoom

If text or details are too small to read, crop the region of interest and re-read at full resolution. Pillow is always available (it's a pixelshot dependency):

python3 -c "from PIL import Image; Image.open('<tile_path>').crop((x1, y1, x2, y2)).save('/tmp/pixelbrowse/crop.png')"

• Coordinates are in pixels from the top-left corner of the tile
• Crop to roughly 800x800 or smaller for maximum clarity
• You can crop multiple times to inspect different regions
• Read the cropped image with the Read tool just like any other image

Use this whenever you see content but can't make out the details — tables, small labels, fine print, chart axes, etc.

Tips

• Output is tiled JPEG images — tile_0000.jpg is the top, higher numbers go down the page
• Use --viewport-width 1280 for desktop layouts, default 875 for mobile/article width
• Supports URLs (http/https), local HTML files, PDFs, and images
• Backend options: --backend cdp (default, fastest) or --backend playwright