API testing, snippets, .gitignore and README generators and code-adjacent helpers that live in your browser toolbar, so small dev chores stop needing a new tab.
5 extensions · all free · official Chrome Web Store links
Developer Tools
API Tester Pro is a powerful browser extension for testing REST, GraphQL, and WebSocket APIs in one place. It allows developers to send requests, analyze responses, and manage configurations easily. With a clean interface and local storage, it streamlines API workflows without relying on external tools or services.
Developer Tools
Code Snippet Manager is a fast, lightweight, and privacy-focused Chrome extension that helps developers save, organize, search, and reuse code snippets directly from the browser. Whether you're a frontend developer, backend engineer, or student, this tool eliminates repetitive typing and keeps your most-used code just one click away.
Developer Tools
GitIgnore Pro is a smart and lightweight tool to generate .gitignore files instantly based on selected technologies. It offers presets, real-time preview, and easy export options. Designed for developers, it simplifies repository setup while keeping everything fast, clean, and fully local without any data tracking or external dependencies.
Developer Tools
Create professional and well-structured README files for your projects with ease. This extension helps developers generate clean documentation using customizable templates, markdown support, and real-time preview. Improve project presentation, maintain consistency, and save development time by quickly producing clear, organized, and visually appealing README files directly from your browser.
Developer Tools
Website Preview Pro is a fast and modern Chrome extension that allows users to instantly generate visual previews (live screenshots) of any website directly from the browser. With a simple and clean interface, users can enter any URL or preview their current tab to view how the website looks without opening it in a new tab. The extension supports both desktop and mobile preview modes, enabling quick responsive checks.
Browser-based AltFTool tools that do a similar job in a tab.
AltFTool publishes 5 free developer tools extensions, including API Tester Pro, Code Snippet Manager, GitIgnore Pro. Each has its own page with features, permissions guidance and a Chrome Web Store link.
Yes. Every extension in this category is free to install and does not need an AltFTool account.
They are built for Chrome. Chromium-based browsers such as Microsoft Edge, Brave and Opera can usually install Chrome Web Store extensions as well.
Browse every AltFTool extension, or search by what you need.