Robots.txt Generator

About this page

Generate a robots.txt file for your website. Control search engine crawlers, specify allowed and disallowed paths, and add sitemap references. CoderFile is a professional online code editor with real-time collaboration, in-browser execution for 34+ languages, AI assist, and instant snippet sharing. The platform is free to start, runs entirely in the browser, and is used daily by students, interviewers, technical writers, and engineering teams who need a friction-free place to write and share code.

What CoderFile is good for

Use it for quick syntax checks while you're away from your local environment, for sharing runnable snippets in code reviews, for walking candidates through live problems in technical interviews, or for embedding executable examples in blog posts and documentation. The editor is powered by Monaco — the same engine behind Visual Studio Code — so the experience feels familiar from the moment you open it.

Snippets can be public, unlisted, or passcode-protected. Pro accounts unlock version history, view-only sharing, longer execution limits, and access to the more capable AI assist modes. Every feature is designed to remove the friction between having an idea and seeing it run.

Explore CoderFile

• Open the online code editor — write and run code in 34+ languages with no setup.
• Read the developer blog — guides, comparisons, and language deep-dives published weekly.
• Browse language cheat sheets — quick reference for syntax, idioms, and stdlib essentials.
• Practice in the Virtual Coding Lab — structured lessons with auto-graded exercises and an AI mentor.
• Browse public snippets — see what the community is building and remix any example.
• About CoderFile — who's behind the project and what we're building toward.