A visual editor for Codex

OpenAI's ChatGPT desktop app, which took over from the separate Codex app in July 2026, has a built-in browser where you can annotate an element and ask Codex to change it. OpenAI can also host what you build, with Sites. If that covers you, you may not need anything else.

InstaWeb is for when you want more around the same agent: any browser instead of a desktop app, three screen sizes at once, Claude Code and Cursor in the same project, a team working on shared projects, and publishing to a host you already use.

See the app while Codex builds it

Your app runs live beside the chat, at desktop, tablet and mobile sizes at once. Every change Codex makes shows up as it is saved, so you watch the result instead of reading a diff.

Click the thing you want changed

Select a heading, a button or a section on the page and type what you want. The agent gets the element, the file and line it comes from, and a screenshot, so you don't have to describe where it is. Double-click text to change it in place without a prompt at all.

Your plan, your models

Pick Codex and any model your ChatGPT plan includes, for each chat. Requests use your plan's Codex limits exactly as they would in the Codex CLI, and InstaWeb's Usage page shows the five-hour and weekly windows as Codex reports them.

Switch agents without losing the thread

Hit a limit, or want a second opinion? Pick another agent from the same menu. InstaWeb hands the new one the conversation so far, so it carries on from where the last one stopped.

Publish to the host you choose

When it is ready, a deploy agent builds the app and puts it on Vercel, Netlify, Cloudflare, AWS or any server you can reach over SSH, signing in through the host's own page. The code stays a normal Git repository in your GitHub.

OpenAI offers Codex in the ChatGPT desktop app, as a CLI, in IDE extensions and in the cloud. The desktop app has a built-in browser for local apps: you can annotate an element or an area, or adjust its font, spacing and colour, then ask Codex to make the change. OpenAI says the browser isn't in the CLI or the IDE extension. Sites, OpenAI's hosting, publishes from ChatGPT on the web or desktop.

InstaWeb runs OpenAI's own, unmodified Codex program on your computer. You sign in with Codex's own login, which finishes on OpenAI's page, and InstaWeb never sees your ChatGPT account. You can use an OpenAI API key instead.

Every request uses your ChatGPT plan's Codex allowance. When a five-hour or weekly limit is reached, you can switch the chat to Claude Code or Cursor and carry on.

Codex works on the project's real files in a normal Git repository, and each run is saved as a commit, so any change can be undone.

1. 1

   Sign in and paste one command

   Sign in at instawebai.com and paste the command it gives you into a terminal. That is the only time you need one: InstaWeb then runs in the background and you work in your browser.

2. 2

   Connect your agent

   Your AI lists Claude Code, Codex, Cursor and OpenCode. If one isn't installed, InstaWeb installs it with its maker's own installer, then opens the maker's own sign-in page. You can paste an API key instead.

3. 3

   Start or open a project

   Describe what you want, import a repository from GitHub, or open a folder on your computer. The app starts in the workspace with a live preview.

InstaWeb is one way to work with Codex, not the only good one. You probably don't need it if:

• You only use Codex, and the browser in the ChatGPT desktop app does what you need.
• You are happy for OpenAI to host the app with Sites.
• Your project isn't a web app. InstaWeb previews apps that have a dev server: Next.js, Vite, Astro, SvelteKit, Nuxt, React Router and more.

Does it work with ChatGPT Plus?

Yes. Codex is included in ChatGPT plans, and InstaWeb uses it through Codex's own sign-in, so requests count against your plan's Codex limits.

Do I need the ChatGPT desktop app?

No. If the Codex program isn't on your computer, InstaWeb installs OpenAI's package for you.

Does InstaWeb add AI costs?

No. InstaWeb is a one-time licence and sells no AI, credits or tokens. Every request runs on the AI plan or API key you already have.

Can I use it on a project I already have?

Yes. Import a repository from GitHub or open a folder on your computer. Projects built in Lovable, Bolt, v0 or Base44 open too, once they are in GitHub.

What happens to my app if I stop using InstaWeb?

Nothing. It is a normal Git repository on your computer and in your GitHub, running on your host. Nothing in it calls InstaWeb.

Everything said about Codex here comes from the official pricing pages and documentation, read on 13 November 2026. Plans and features change: check them before you decide, and tell us if something here is out of date.

• Codex docs
• Codex docs: the built-in browser
• Codex docs: pricing and limits
• Codex docs: Sites
• OpenAI help: moving to the new ChatGPT desktop app