GUI Hub
For Claude, Cursor, VS Code & other MCP clients

Can Claude compress or resize photos?

Not on its own. a chat AI can't run programs or write files on your computer. With the GUI Hub Essentials MCP server installed, Claude (Desktop or Code), Cursor, VS Code and other MCP clients can compress images locally: the assistant calls the caesium_compress tool, which runs Caesium on your machine. Files are not uploaded.

Set it up (2 minutes)

  1. Claude Code / Cursor / VS Code / Windsurf: add the MCP server
    npx -y https://guihub.cc/mcp.tgz --product=essentials
    Claude Code: claude mcp add gui-hub-essentials -- npx -y https://guihub.cc/mcp.tgz --product=essentials
  2. Claude Desktop: download the one-file extension and double-click it.
  3. No AI? GUI Hub Essentials is also a point-and-click desktop app.

Then ask

“Make these photos each under 500 KB.”

What the AI gets

caesium_compress — Compress, resize and/or convert image files (JPG, PNG, WebP, GIF, TIFF) on the user's computer. Writes compressed copies (same file names) into outDir; never modifies originals or overwrites existing files. Use mode=size with maxSize (bytes) to fit upload limits. File dates are kept by default (keepDates).

InputType
inputs*array
modestring (quality, size, lossless)
qualitystring (92, 80, 65, 50)
maxSizestring (2000000, 1000000, 500000, 200000, 100000)
resizestring (, 3840, 2560, 1920, 1280, 800)
formatstring (original, jpeg, webp, png)
exifboolean
keepDatesboolean
outDir*string

Cost

Free to install; each tool has 3 free uses. Then $9 once for all of GUI Hub Essentials (no subscription). The tool tells the assistant when free uses run out and how to unlock.

Powered by Caesium (Apache-2.0), the official release, verified by SHA-256. GUI Hub is independent and not affiliated with Caesium, Anthropic, Cursor or Microsoft.

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