OpenGravity – A zero-install, BYOK vanilla JS clone of Antigravity
Hi. I’m a high school student studying for my GCSEs. I was using Google Antigravity heavily for my side projects, but I kept hitting the usage limits, and getting random "agent terminated" errors. So I decided to try build my own version of the IDE. I love the UI, so I copied it as accurately as possible, and then hooked up some logic into it, including the INCREDIBLY finicky webcontainer api. I tried to keep it super lightweight, no build steps, or dependencies, and now that its open source, I'm hoping people can build things on top of it that arent possible with closed source tools, like…
OpenGravity – A zero-install, BYOK vanilla JS clone of Antigravity launched on May 11, 2026 with 106 votes, #289 of 20,538 launches that month and more than 95% of that year's launches.
In plain words
OpenGravity is a lightweight, open-source IDE built in vanilla JavaScript that replicates Google's Antigravity interface without installation or dependencies. Created by a high school student to overcome usage limits and error issues, it provides an alternative for developers building AI agent projects. The tool uses the WebContainer API and offers a foundation for custom workflows and extensions not possible with closed-source alternatives, making it accessible for both learning and development purposes.
written from the facts on this page · September 2026
From the sources
A lightweight, vanilla JS, open source BYOK (Bring Your Own Key) clone of the Google Antigravity UI. It currently features a live xterm.js terminal with direct local file system sync and a sidebar agent capable of running commands and editing files. Built in pure HTML/CSS/JS for maximum speed and zero installation. - ab-613/OpenGravity
An experimental, lightweight, BYOK (Bring Your Own Key) recreation of the Google Antigravity UI. OpenGravity provides a browser-based, reasoning-enabled IDE with a live xterm.js terminal powered by the WebContainer API. It features direct local file system sync and a proactive autonomous agent capable of orchestrating basic software engineering tasks, running shell commands, and editing files in real-time. It’s currently a work-in-progress though. It works for basic coding tasks, but consider this the "Alpha" version. Built in pure HTML/CSS/JS for maximum speed and zero installation. The agent can proactively initialize projects, install dependencies using pnpm , and build complete…from github.com
In the maker’s words, at launch
Hi. I’m a high school student studying for my GCSEs. I was using Google Antigravity heavily for my side projects, but I kept hitting the usage limits, and getting random "agent terminated" errors. So I decided to try build my own version of the IDE. I love the UI, so I copied it as accurately as possible, and then…
Does a similar job
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