Claude Code mod
file-viewer
Inline previews of PDFs, Office files, images and animated GIFs in Claude Code, with a paging viewer and a preview tool Claude can call
Install
/plugin marketplace add matteo-psnt/file-viewer
/plugin install file-viewer@file-viewerMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L2Writes or runs: runs processes, writes files, drives Claude, reads files, reads env vars, reads mod state, persists state, draws
- Sees
- mcp__file-viewer__preview calls
- Draws in
AbovePromptToolResultPane- Hooks
session.startcommand.runtool.callui.renderui.focusui.messagesession.end
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- matteo-psnt/file-viewer
- Folder
plugin- Marketplace
file-viewer- Author
- Matteo Pesenti
- License
- MIT
- Last updated
- 19 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is file-viewer?
Inline previews of PDFs, Office files, images and animated GIFs in Claude Code, with a paging viewer and a preview tool Claude can call It is a mod for Claude Code, from matteo-psnt/file-viewer on GitHub.
What can the file-viewer mod access?
Its widest reach is "writes or runs" (runs processes, writes files, drives Claude, reads files, reads env vars, reads mod state, persists state, draws). It sees mcp__file-viewer__preview calls. It draws in AbovePrompt, ToolResult, Pane. Like any mod, it runs with your permissions.
How do I install file-viewer?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add matteo-psnt/file-viewer and then /plugin install file-viewer@file-viewer.
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