Project IDX
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Last reviewed
Jun 3, 2026
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Source-backed
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v1 · 1,375 words
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Project IDX is an experimental, browser-based cloud development environment built by Google. It was announced on August 8, 2023, and gave developers a full-stack workspace that ran entirely in the browser, with integrated generative AI assistance, cloud-backed previews and emulators, and tight links to Google Cloud and Firebase services [1][2]. The product was built on Code OSS, the open-source codebase that underpins Microsoft's Visual Studio Code, so the editor felt familiar to most developers from the first session [1][3]. In April 2025, Google folded Project IDX into a new product called Firebase Studio, and the standalone IDX brand was retired [4][5].
When Google launched Project IDX, the company framed it as an answer to the fragmentation of modern application development. Rather than asking developers to assemble a local toolchain across editors, runtimes, emulators, and deployment targets, IDX put the whole loop in a single browser tab backed by a Linux virtual machine in the cloud [1][3]. Google deliberately chose not to build a new editor from scratch. Instead it forked Code OSS, the fully open-source version of Visual Studio Code that strips out Microsoft's proprietary additions, which let IDX reuse the broader extension ecosystem through the Open VSX registry [3].
The environment ran on Google Cloud infrastructure, and the editor itself was hosted on Google Cloud Workstations [3]. Developers could optionally use Nix to describe and customize a workspace's environment, pinning the tools and packages a given project needed [3]. At launch IDX was invite-only, gated behind a waitlist, and the product carried a clear "experimental" label throughout its life [1][2].
Project IDX targeted full-stack and multiplatform work out of the box. At announcement it supported frameworks including Angular, Flutter, Next.js, React, Svelte, and Vue, with languages such as JavaScript and Dart, and Google said Python and Go support were on the way [1][3]. The InfoWorld review of the environment confirmed TypeScript support alongside JavaScript and Dart, and noted that the framework list grew over time [3].
A central selling point was the preview system. IDX could render a live web preview of an app and, where the underlying template supported it, run the app inside an embedded Android emulator or iOS simulator directly in the browser [3]. Project templates made it quick to scaffold a new app for a chosen framework, and Git and GitHub integration let developers import an existing repository or push changes back out [1][3].
The table below summarizes the environment as it stood during the open beta.
| Aspect | Detail |
|---|---|
| Editor base | Code OSS (open-source VS Code) [3] |
| Hosting | Google Cloud Workstations on Google Cloud [3] |
| Workspace config | Optional Nix-based customization [3] |
| Languages | JavaScript, TypeScript, Dart; later Go, Python [3] |
| Frameworks | Angular, React, Next.js, Vue, Svelte, Flutter, Astro [3][6] |
| Previews | Web preview plus Android emulator and iOS simulator [3] |
| Source control | Git and GitHub import and sync [1] |
| Deployment | Firebase Hosting; later Cloud Run [1][6] |
One notable constraint during the beta was a cap of two concurrent projects per user [3].
Generative AI was part of Project IDX from the start, though the model behind it changed over the product's lifetime. At the August 2023 announcement, the AI features were powered by Codey, Google's code-focused foundation model built on the PaLM 2 large language model [1][2]. IDX shipped with code completion as you typed, an assistive chat for general and code-specific questions, code explanation, and contextual actions such as adding comments to a function [1][2].
Google migrated the assistant to its Gemini models in early 2024. In a Google Developers blog post dated February 15, 2024, the company described how IDX used Gemini to provide AI features across the workflow, including inline AI assistance triggered with Cmd or Ctrl plus I, which let a developer describe a change in natural language and receive real-time suggestions, error correction, and completions [7]. The same update introduced a Gemini API template built around the Gemini Pro model so developers could embed AI features into their own apps without extra setup [7]. By the open beta, IDX exposed Gemini through slash commands such as /fixError, /explain, and /addComments to speed up common tasks [6][7]. The AI assistance that IDX pioneered later carried over into Google's broader developer AI lineup, including Gemini Code Assist [4].
Project IDX moved from its invite-only waitlist into open beta on May 14, 2024, during Google I/O 2024, at which point Google said more than 100,000 developers had already tried the service [6]. The I/O update layered on built-in iOS and Android emulators, integrations with Google Maps Platform for geolocation, Chrome DevTools and Lighthouse for debugging and performance, and Google's Checks compliance platform, along with planned Cloud Run deployment [6]. Jeanine Banks, Google's vice president for Developer X, said the templates made it "really frictionless" to start with a preferred framework or language [6].
Press coverage was broadly positive but cautious. TechCrunch covered both the 2023 announcement and the 2024 open beta, positioning IDX as Google's bid for a next-generation cloud IDE [1][6]. InfoWorld called it "a promising next-generation cloud IDE" and judged it "certainly worth a try" for developers who kept current GitHub repositories, while flagging the two-project limit, a backlog of open bug reports, and Google's well-known history of discontinuing products as reasons for caution [3].
At Google Cloud Next 2025, in an announcement dated April 9, 2025, Google introduced Firebase Studio and brought Project IDX under it [4][5]. Firebase described the new product as a cloud-based, agentic development environment, powered by Gemini, for building and shipping production-quality AI apps in one place [8]. The official Firebase messaging stated plainly that "Project IDX is now part of Firebase Studio," and that the move reflected a goal of integrating IDX into the Firebase ecosystem [5].
Rather than a simple rename, Firebase Studio fused several existing pieces into one experience. Google's blog said it "fuses tools like Project IDX, Genkit and Gemini in Firebase into a unified, agentic experience," with the Cloud Run and Google Cloud blog posts likewise describing Firebase Studio as building on IDX as a fork of Code OSS [4][8]. The standout new capability was the App Prototyping agent, which could generate a working Next.js prototype from multimodal inputs such as natural language, images, and drawing tools, and then publish it to Firebase App Hosting [4][8]. Firebase Studio launched in preview for everyone, with more than 60 pre-built templates and a free tier of three workspaces, rising to 30 for Google Developer Program members [8].
For existing users, the migration was largely automatic. Google said IDX workspaces and projects would open in Firebase Studio once a user accepted the Firebase Terms of Service, with access moving to studio.firebase.google.com [5]. The development work behind IDX, including its Gemini assistance and framework support, carried forward into Firebase Studio [5].
The lineage did not stop there. On March 19, 2026, Google announced that Firebase Studio itself would be sunset, disabling new workspace creation on June 22, 2026, and fully shutting down the environment on March 22, 2027, after which remaining workspace data would be deleted [5][9]. Google pointed developers toward other tools, including Google AI Studio and its agent-first platform, for code-centric and prototype-to-production workflows, while noting that core Firebase services and any apps already deployed would keep running [5][9]. Through these transitions, Project IDX stands as the experimental starting point for Google's browser-based, AI-assisted development tooling.