Best AI Coding Agents for HTML

JetBrains Junie is an innovative AI coding assistant that works inside many JetBrains IDEs to streamline programming efforts and boost efficiency. This agent leverages advanced AI to help developers write, test, and inspect code without leaving their familiar development environment. Junie offers both code execution and interactive collaboration, allowing programmers to switch between automated code writing and brainstorming sessions for features and improvements. By deeply understanding the codebase, Junie identifies the best ways to tackle tasks and ensures all changes meet quality standards through syntax and semantic checks. It also runs tests to minimize errors and keep the project healthy, freeing developers from routine tasks. Many developers have successfully built complex applications and games using Junie, highlighting its flexibility across different languages and frameworks. The AI adapts to each task’s complexity and workflow, making coding less tedious and more focused on creativity. Whether you are building a simple web app or a complex game, Junie offers smart support throughout the development cycle.

Windsurf is a cutting-edge IDE designed for developers to maintain focus and productivity through AI-driven assistance. At the heart of the platform is Cascade, an intelligent agent that not only fixes bugs and errors but also anticipates potential issues before they arise. With built-in features for real-time code previews, automatic linting, and seamless integrations with popular tools like GitHub and Slack, Windsurf streamlines the development process. Developers can also benefit from memory tracking, which helps Cascade recall past work, and smart suggestions that enhance code optimization. Windsurf’s unique capabilities ensure that developers can work faster and smarter, reducing onboarding time and accelerating project delivery.

v0 is a next-generation AI development environment created by Vercel, designed to accelerate the way individuals and teams build for the web. Acting as a 24/7 pair-programmer, v0 understands natural language and converts ideas into production-ready code using frameworks like React, Svelte, and Vue. Users can upload Figma files, screenshots, or sketches, which v0 transforms into pixel-perfect, responsive applications. Beyond frontend generation, v0 supports full-stack builds with authentication, database connections, and API integrations. It offers seamless editing, GitHub synchronization, and instant deployment to Vercel’s hosting environment, allowing developers to go from idea to live app in minutes. The platform includes team collaboration tools, version history, and customizable workflows for designers, developers, and project managers alike. Security and compliance are central to its design, with SOC 2 Type 2 certification ensuring enterprise-grade protection. Whether you’re prototyping an MVP or scaling a complex system, v0 simplifies the entire lifecycle—from prompt to production.

bolt.diy is an open-source platform that empowers developers to effortlessly create, run, modify, and deploy comprehensive web applications utilizing a variety of large language models (LLMs). It encompasses a diverse selection of models, such as OpenAI, Anthropic, Ollama, OpenRouter, Gemini, LMStudio, Mistral, xAI, HuggingFace, DeepSeek, and Groq. The platform facilitates smooth integration via the Vercel AI SDK, enabling users to tailor and enhance their applications with their preferred LLMs. With an intuitive user interface, bolt.diy streamlines AI development workflows, making it an excellent resource for both experimentation and production-ready solutions. Furthermore, its versatility ensures that developers of all skill levels can harness the power of AI in their projects efficiently.

Goose, also referred to as codename goose, is an open-source AI agent that operates locally on machines, designed to facilitate the automation of engineering tasks within a terminal or integrated development environment (IDE). By efficiently performing functions such as code creation, debugging, and deployment, it allows developers to shift their focus towards more complex problem-solving activities. Its flexible architecture supports customization with various large language models (LLMs) and the integration of external APIs, which broadens its functionality to meet the unique demands of different projects. By taking on intricate tasks autonomously, Goose simplifies the development workflow, thereby enhancing overall productivity and minimizing the need for manual intervention. Users have expressed appreciation for Goose's capabilities in managing responsibilities like dependency updates, test execution, and code migration automation, underscoring its usefulness in practical scenarios. Furthermore, as the landscape of software development evolves, tools like Goose are becoming increasingly vital for maintaining efficiency in a fast-paced environment.

GPT-4.1 represents a significant upgrade in generative AI, with notable advancements in coding, instruction adherence, and handling long contexts. This model supports up to 1 million tokens of context, allowing it to tackle complex, multi-step tasks across various domains. GPT-4.1 outperforms earlier models in key benchmarks, particularly in coding accuracy, and is designed to streamline workflows for developers and businesses by improving task completion speed and reliability.

Create stunning, contemporary web applications with remarkable speed and ease. Simply articulate your needs, and Replit's AI Agent will construct it for you. Introducing Replit Agent, a sophisticated AI designed to make coding easy for everyone. Develop at lightning speed and have your project ready for launch in mere minutes. Just provide a description of the application or website you wish to create, and Replit AI will assist you in refining your ideas for optimal outcomes. Replit Agent will devise a strategy to turn your vision into reality. Begin with a basic prototype and gradually incorporate additional features by issuing straightforward prompts. Enhance your project through a user-friendly chat interface, where the agent will solicit your feedback after each phase of the development plan, ensuring your requests are seamlessly integrated into subsequent tasks. You can deploy your application or website to a live URL in just a few minutes. With support from Google Cloud, Replit Deployments empower you to launch your startup, streamline your work processes, expand your audience, and accomplish more — all at an unprecedented pace. Plus, with continuous updates and improvements, your projects can evolve alongside your ambitions.

Devin is an advanced software development assistant powered by AI, created to work in tandem with engineering teams to streamline and enhance coding processes. It assists with various tasks such as initiating repositories, coding, debugging errors, and executing migrations, functioning either independently or in collaboration with human developers. Over time, Devin improves its efficiency by learning from provided examples. Its implementation has resulted in substantial time and financial savings on extensive projects, exemplified by its use at Nubank, where it achieved migration speeds 8 to 12 times faster and cut costs by more than 20 times. Additionally, Devin excels in both refactoring code and automating repetitive engineering tasks, making it an invaluable tool for developers looking to optimize their workflow. Its ability to continuously adapt ensures that it remains an essential asset in the ever-evolving landscape of software development.

Refact.ai is an advanced AI-powered assistant that integrates directly into your IDE, offering intelligent code completion, real-time code suggestions, and automatic refactoring to streamline the coding process. By using the AI model trained on your codebase, Refact.ai adapts to your team's style, providing highly relevant recommendations to enhance productivity. Developers can also fine-tune the assistant to better suit their unique requirements, making it a powerful tool for personalized coding assistance. With support for all major IDEs and secure on-premise deployment, Refact.ai empowers developers to increase code quality, reduce time spent on manual tasks, and achieve faster results.

Kombai is a dedicated AI-powered frontend development assistant designed to generate clean, scalable code that aligns with your project’s tech stack and design system. Unlike generic AI coding tools, Kombai excels at translating real-world Figma designs and textual specifications into fully functional frontend components using frameworks like React, Next.js, and libraries such as MUI and Tailwind CSS. The platform supports complex frontend tasks, including adding features to large repositories and building responsive websites powered by content management systems. Its built-in context-engine and indexing tools help it understand your existing codebase, speeding up code reuse and enhancing accuracy. Kombai also offers editable task plans and previews, allowing developers to review and optimize code before committing. The solution is isolated to frontend code, ensuring no unintended backend changes occur. Enterprise customers benefit from custom context setups and strict data privacy policies, including SOC2 compliance. Kombai empowers teams to boost development velocity and maintain high code quality in modern frontend projects.

Cosine is capable of grasping both broad concepts and intricate details to deliver answers that surpass human capabilities. We are more than just a layer over an LLM; our approach integrates various methods such as static analysis and semantic search among others. Just pose a question to Cosine about adding a new feature or altering existing code, and we will produce a comprehensive step-by-step guide. Cosine meticulously indexes your codebase, comprehending it on various dimensions; from the relationships among files and functions to an in-depth semantic analysis of the code, ensuring that any inquiry regarding your codebase can be addressed. Genie stands out as the leading AI software engineer, boasting an impressive 30% evaluation score on the widely recognized SWE-Bench benchmark. It excels at debugging, feature development, and code refactoring, performing these tasks either completely independently or in collaboration with the user, creating a partnership akin to working alongside a colleague rather than merely acting as a copilot. Essentially, both Cosine and Genie redefine the standards of what AI can achieve in software engineering.

Introducing MarsCode: an advanced AI development tool designed for immediate use. This innovative platform features an 'out-of-the-box cloud AI IDE' and a 'robust AI assistant,' making it an essential resource for developers seeking to enhance their learning and streamline their workflow. Among its standout features are: 1. A cloud-based AI IDE that frees developers from the limitations of specific devices and locations. 2. Integration options for local IDEs, which infuse traditional development practices with cutting-edge AI capabilities. 3. A suite of tools for code completion, bug fixing, and optimization, offering intelligent support throughout the entire coding journey. 4. An intelligent Q&A feature at the repository level, enabling developers to concentrate on their tasks with greater ease. 5. Versatile deployment support for various types of applications, including websites, AI plugins, and APIs, catering to a broad range of development needs. With MarsCode, developers not only gain access to powerful tools but also experience a newfound level of productivity and efficiency in their projects.

An autonomous coding assistant integrated directly within your IDE, this tool can create and modify files, execute commands, browse the web, and more, all with your explicit consent throughout the process. Cline is designed to tackle intricate software development challenges methodically. Equipped with capabilities to generate and adjust files, navigate extensive projects, utilize web resources, and perform terminal commands (once you authorize), he offers support that transcends mere code completion or technical assistance. Unlike traditional AI scripts that operate in isolated environments, this extension features a user-friendly interface that requires your approval for every file modification and command execution, ensuring a secure and user-friendly approach to harnessing the capabilities of autonomous AI. By incorporating such a system, developers can explore innovative solutions while maintaining control over their coding environment.

Devika is an innovative open-source AI software engineer that interprets high-level commands, dissects them into actionable steps, gathers pertinent information, and writes code to achieve specified goals. By leveraging advanced language models, reasoning techniques, and browsing functionalities, Devika effectively aids in software development, handling intricate coding challenges with little human oversight. The platform is compatible with various programming languages and boasts essential features such as sophisticated AI planning, contextual keyword identification, and real-time agent monitoring. With the intention of becoming a formidable competitor to proprietary AI solutions, Devika presents a bold, open-source alternative for developers seeking versatile support in their projects. Ultimately, it seeks to empower programmers by streamlining the coding process and enhancing productivity.

Codex CLI is a powerful open-source AI tool that runs in your command line interface (CLI), offering developers an intuitive way to automate coding tasks and improve code quality. By pairing Codex CLI with your terminal, developers gain access to AI-driven code generation, debugging, and editing capabilities. It enables users to write, modify, and understand their code more efficiently with real-time suggestions, all while working directly in the terminal without switching between tools. Codex CLI supports a seamless coding experience, empowering developers to focus more on building and less on managing tedious coding processes.

GPT-5.1-Codex is an advanced iteration of the GPT-5.1 model specifically designed for software development and coding tasks that require autonomy. The model excels in both interactive coding sessions and sustained, independent execution of intricate engineering projects, which include tasks like constructing applications from the ground up, enhancing features, troubleshooting, conducting extensive code refactoring, and reviewing code. It effectively utilizes various tools, seamlessly integrates into developer environments, and adjusts its reasoning capacity based on task complexity, quickly addressing simpler challenges while dedicating more resources to intricate ones. Users report that GPT-5.1-Codex generates cleaner, higher-quality code than its general counterparts, showcasing a closer alignment with developer requirements and a reduction in inaccuracies. Additionally, the model is accessible through the Responses API route instead of the conventional chat API, offering different configurations such as a “mini” version for budget-conscious users and a “max” variant that provides the most robust capabilities. Overall, this specialized version aims to enhance productivity and efficiency in software engineering practices.

GPT Pilot is an innovative open-source AI application designed to function as a comprehensive AI developer, generating fully operational applications with very little human intervention. In contrast to basic code autocompletion utilities, GPT Pilot is capable of creating entire features, troubleshooting code, discussing problems, and even soliciting code reviews. This tool seeks to expand the horizons of AI-driven software development by managing as much as 95% of coding responsibilities, reserving the remaining 5% for human developers. Additionally, it is designed to work seamlessly with platforms such as VS Code, allowing for real-time collaboration between developers and AI. By facilitating this partnership, GPT Pilot empowers developers to focus on more complex tasks while the AI handles routine coding challenges.

smol-developer is a community-driven library designed to help developers incorporate a robust AI-based "junior developer" assistant into their software projects. This innovative agent employs natural language processing to not only generate and scaffold code but also provide ongoing support throughout the development cycle. In contrast to traditional methods, smol-developer fosters a more dynamic engagement, allowing the AI to revise and enhance code in response to user input. This feature makes it particularly suitable for creating tailored scaffolds for specific projects and automating tedious tasks. By utilizing this library, developers can significantly accelerate their development timelines, craft bespoke code architectures, and work alongside the AI in a collaborative manner, all in real-time, which enhances productivity and innovation in software creation.

GPT-5-Codex is an enhanced iteration of GPT-5 specifically tailored for agentic coding within Codex, targeting practical software engineering activities such as constructing complete projects from the ground up, incorporating features and tests, debugging, executing large-scale refactors, and performing code reviews. The latest version of Codex operates with greater speed and reliability, delivering improved real-time performance across diverse development environments, including terminal/CLI, IDE extensions, web platforms, GitHub, and even mobile applications. For cloud-related tasks and code evaluations, GPT-5-Codex is set as the default model; however, developers have the option to utilize it locally through Codex CLI or IDE extensions. It intelligently varies the amount of “reasoning time” it dedicates based on the complexity of the task at hand, ensuring quick responses for small, clearly defined tasks while dedicating more effort to intricate ones like refactors and substantial feature implementations. Additionally, the enhanced code review capabilities help in identifying critical bugs prior to deployment, making the software development process more robust and reliable. With these advancements, developers can expect a more efficient workflow, ultimately leading to higher-quality software outcomes.

Agentforce Vibes presents vibe coding, an innovative AI-driven method that empowers developers to transform natural language directives into fully functional Salesforce applications that meet enterprise-level security, governance, and infrastructure requirements. In contrast to more basic vibe coding solutions that are primarily focused on prototyping, Agentforce Vibes encompasses the entire development lifecycle, including ideation, construction, testing, deployment, and observability, while seamlessly integrating with Salesforce's foundational platform and trust frameworks. Acting as an AI-enhanced integrated development environment (IDE) compatible with VS Code or similar environments, it comprehends your Salesforce schema and metadata, facilitating capabilities such as agentic code generation for multiple languages (Apex, HTML, CSS, JavaScript), intelligent enforcement of rules, creation of test cases, debugging, rollbacks, and natural language-driven DevOps. Furthermore, it accommodates various language models, is expandable through the Model Context Protocol (MCP) featuring over 20 integrated tools, and promotes the reuse of pre-existing code, making it a versatile solution for developers. This comprehensive approach not only streamlines development processes but also enhances productivity by reducing the time and effort required to build robust applications.

The GPT-5.1-Codex-Max represents the most advanced version within the GPT-5.1-Codex lineup, specifically tailored for software development and complex coding tasks. It enhances the foundational GPT-5.1 framework by emphasizing extended objectives like comprehensive project creation, significant refactoring efforts, and independent management of bugs and testing processes. This model incorporates adaptive reasoning capabilities, allowing it to allocate computational resources more efficiently based on the complexity of the tasks at hand, ultimately enhancing both performance and the quality of its outputs. Furthermore, it facilitates the use of various tools, including integrated development environments, version control systems, and continuous integration/continuous deployment (CI/CD) pipelines, while providing superior precision in areas such as code reviews, debugging, and autonomous operations compared to more general models. In addition to Max, other lighter variants like Codex-Mini cater to budget-conscious or scalable application scenarios. The entire GPT-5.1-Codex suite is accessible through developer previews and integrations, such as those offered by GitHub Copilot, making it a versatile choice for developers. This extensive range of options ensures that users can select a model that best fits their specific needs and project requirements.

OpenAI Codex is a powerful AI tool that helps developers accelerate their coding workflows by automating a variety of tasks. From writing features and running tests to proposing pull requests (PRs) and answering questions about the codebase, Codex can take on these tasks in parallel. Each task runs in its own secure cloud environment, preloaded with the relevant repository, ensuring safe and efficient operations. Codex is available to ChatGPT Pro, Enterprise, and Team users, with future access for Plus and Edu users. By using Codex, developers can offload repetitive tasks, speed up feature development, and focus more on higher-level, strategic work.