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Anthropic / Claude for Chrome — javascript_tool

TOOL

Execute JavaScript code in the context of the current page. The code runs in the page's context and can interact with the DOM, window object, and page variables. Returns the result of the last expression or any thrown errors. If you don't have a valid tab ID, use tabs_context first to get available tabs.

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Overview

Anthropic / Claude for Chrome — javascript_tool: a free, copy-ready tool on OpenRuna. Execute JavaScript code in the context of the current page. The code runs in the page's context and can interact with the DOM, window object, and page variables. Returns

What this tool does

"Anthropic / Claude for Chrome — javascript_tool" packages a proven tool so you can skip the trial-and-error of writing one from scratch. Execute JavaScript code in the context of the current page. The code runs in the page's context and can interact with the DOM, window object, and page variables. Returns the result of the last expression or any thrown errors. If you don't have a valid tab ID, use tabs_context first to get available tabs. On OpenRuna it sits inside a connected graph of related tools, tools, and datasets, so branching into adjacent resources is one click away. Open a new conversation and paste it in, wire it into an agent, or keep it in your team's prompt library.

Use cases

  • Reach for it during planning or review sessions when you want consistent, AI-assisted structure.
  • Combine it with related tools and prompts in the same OpenRuna category to build an end-to-end workflow.
  • Hand "Anthropic / Claude for Chrome — javascript_tool" to a new teammate so their tool output matches your team's quality bar from day one.
  • Use "Anthropic / Claude for Chrome — javascript_tool" when you need a repeatable tool for professional work without rewriting instructions every time.

Example output

Ask the model to apply "Anthropic / Claude for Chrome — javascript_tool" to your scenario and it returns a structured answer — clear sections, actionable steps, and assumptions stated upfront — ready to paste into docs, tickets, or code comments. Expect 2–3 iterations to dial in tone and depth for your context.

Tips by platform

Claude

With Claude, drop this tool into Project knowledge so every chat in the project inherits it. Ask Claude to restate the goal first, then run — it catches edge cases early.

ChatGPT

For ChatGPT, save this tool as a Custom Instruction or a saved prompt so it is one click away. Add your specifics in a follow-up rather than editing the original.

Cursor

In Cursor, lift the key instructions from this tool into .cursorrules or a SKILL.md file, then reference it in Agent mode with @ mentions. Keep the title in a comment so teammates can find it on OpenRuna.

Frequently asked questions

What is "Anthropic / Claude for Chrome — javascript_tool"?
It is a tool listed on OpenRuna — Execute JavaScript code in the context of the current page. The code runs in the page's context and can interact with the DOM, window object, and page variables. Returns the result of the last expression or any thrown errors. If you don't have a valid tab ID, use tabs_context first to get available tabs. You can copy and adapt it for ChatGPT, Claude, Cursor, or any other AI assistant.
Is "Anthropic / Claude for Chrome — javascript_tool" free to use?
Most OpenRuna resources are open or CC0-licensed. Check the license shown on this page before commercial use; premium collections are clearly marked as such.
How do I get the best results from this tool?
Replace any placeholders, add your project context, and ask the model to confirm its assumptions first. Iterate over 2–3 follow-up turns rather than expecting a perfect first response.
Does "Anthropic / Claude for Chrome — javascript_tool" work with both Claude and ChatGPT?
Yes — it is model-agnostic text, so it runs on Claude, ChatGPT, Gemini, and Cursor. The tips on this page cover each of those assistants specifically.
Where can I find resources related to "Anthropic / Claude for Chrome — javascript_tool"?
Scroll to the Related resources section on this page, or open the matching category hub on OpenRuna to find connected prompts, tools, agents, and datasets in the same topic area.

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